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Zorluk: OrtaStrengthening or Weakening Author Assertions

Passage:
In the late nineteenth century, the rapid expansion of municipal water infrastructure across industrializing urban centers in Western Europe coincided with a dramatic decline in waterborne epidemic diseases, particularly cholera and typhoid. Standard historical accounts typically credit this public health transformation to technological innovations in sanitary engineering—specifically, the widespread installation of large-scale, centralized slow sand filtration beds designed to filter pathogens from municipal water supplies.

However, economic historian Elena Vance challenges this prevailing consensus, arguing that technological innovation was a secondary factor in lowering infection rates. Vance asserts that the decisive driver of public health improvements was actually a fundamental shift in municipal water rate structures: the transition from flat-rate billing to universal volumetric metering for commercial and residential users. Under flat-rate systems, consumers paid a fixed fee regardless of volume, which Vance notes led to unchecked consumption and widespread structural waste. This excessive volume regularly overwhelmed early municipal waterworks, forcing plant operators to divert raw, unfiltered river water directly into distribution mains to maintain water pressure during peak demand hours. By imposing volumetric metering, municipalities incentivized conservation, thereby stabilizing daily flow rates within the operational capacity of the sand filtration beds. Thus, Vance concludes that financial policy incentives, rather than sanitary engineering alone, were the essential precondition for the operational efficacy of nineteenth-century water purification technologies.

Which of the following statements, if true, would most seriously weaken Vance's assertion regarding the primary driver of public health improvements in nineteenth-century municipal water systems?

  1. A
    Engineering logs from several major industrial cities indicate that raw water diversions dropped by over eighty percent within six months of implementing volumetric water metering.
  2. Municipal archival records demonstrate that cities retaining flat-rate water billing expanded their filtration infrastructure capacity to handle peak flows, preventing raw water diversions and achieving disease reduction rates comparable to cities with volumetric metering.Cevap
  3. C
    Industrial manufacturers operating in municipalities with volumetric water metering reported notable declines in quarterly profit margins due to increased water expenditure.
  4. D
    Contemporary nineteenth-century sanitary engineers overwhelmingly attributed urban public health progress to breakthroughs in filter bed design rather than local administrative billing reforms.
  5. E
    Nineteenth-century public health researchers argued that slow sand filtration systems were capable of neutralizing a broad range of waterborne bacterial pathogens under ideal laboratory conditions.

Cevap

The argument is most seriously weakened by showing that municipalities retaining flat-rate billing expanded filtration capacity to handle peak demand, successfully eliminating raw water diversions and achieving identical disease reduction rates without volumetric metering.
The correct response undermines Vance's central claim by demonstrating that financial metering was not necessary to achieve public health goals. By showing that municipalities retaining flat-rate billing achieved equivalent disease reduction simply by expanding filtration capacity to handle peak volume, the response proves that technological adaptation alone could resolve the diversion issue without rate reform.

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1
Identify the author's target assertion and underlying logic.
Vance asserts that volumetric metering (financial policy), rather than sand filtration technology alone, was the decisive driver of disease reduction because flat-rate systems caused volume overloads that forced raw water diversions.
To weaken an assertion, one must target the specific causal link connecting the proposed cause (metered pricing) to the observed effect (public health improvement).
2
Evaluate potential counter-evidence that severs or undermines this causal link.
If cities without metered pricing achieved equal health improvements simply by expanding filtration capacity to prevent raw water diversions, then metered pricing was not a necessary or decisive precondition.
Demonstrating that the outcome occurs to the same degree via an alternative mechanism without the hypothesized key factor invalidates the claim that the key factor was essential.

Anahtar Kavram

Weakening an Author's Causal Assertion in Reading Comprehension
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Konular

Strengthening or Weakening Author Assertions

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