Conservators at a national museum suspect that a famous seventeenth-century oil painting suffered discolored fading primarily due to historical exposure to trace hydrogen sulfide gas released by nineteenth-century coal heating systems. To prevent further chemical degradation, the museum plans to install specialized ambient air filtration units designed to absorb hydrogen sulfide gas from the gallery. The head curator concludes that installing these units will effectively halt the ongoing chemical discoloration of the painting.
Which of the following, if true, provides the strongest support for the head curator's conclusion?
- Air quality sensors in the gallery have recently measured continuous trace levels of hydrogen sulfide entering the building from outside vehicle exhaust.Cevap
- BThe proposed chemical filtration units emit low concentrations of nitrogen dioxide gas as an operational byproduct, a compound known to accelerate paint binder breakdown.
- COther seventeenth-century paintings created in the same geographic region relied on plant-based organic pigments that are unaffected by sulfur compounds.
- DThe total operational cost of installing and maintaining the ambient filtration units is substantially lower than hiring a team of art restoration experts.
- ECoal heating systems utilized during the nineteenth century produced higher concentrations of airborne particulates than modern gas heating systems do.
Cevap
The argument is most strongly supported by the statement indicating that air quality sensors in the gallery have recently measured continuous trace levels of hydrogen sulfide entering the building from outside vehicle exhaust.
The curator concludes that filtering hydrogen sulfide will halt ongoing discoloration. For this plan to succeed, hydrogen sulfide must currently be present in the gallery environment. Demonstrating that modern vehicle exhaust introduces continuous trace levels of hydrogen sulfide into the gallery confirms that an active threat exists for the filters to neutralize, directly supporting the conclusion.
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Strengthening Causal Plans by Confirming Present-Day Hazard
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