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Difficulty: MediumIdentifying Background Information and Contextual Claims

For decades, regional power grid operators relied almost exclusively on fossil-fuel peaker plants to maintain system stability during unexpected surges in electricity demand. Recently, however, municipal utility commissions began mandating the integration of large-scale lithium-iron battery storage systems to absorb surplus solar power. Critics contend that battery degradation over time makes these systems financially unsustainable for long-term grid support. Nevertheless, newly developed predictive thermal management software significantly extends battery lifespan, demonstrating that battery storage remains a cost-effective alternative to fossil-fuel generation.

In the argument presented above, which of the following best describes the role played by the bolded portion?

  1. It describes a historical practice that provides contextual background for the current regulatory transition and subsequent debate.Answer
  2. B
    It is a premise offered directly to support the author's main conclusion regarding the cost-effectiveness of battery storage.
  3. C
    It presents the primary conclusion that the overall argument is structured to establish.
  4. D
    It introduces a counterargument raised by critics to challenge the viability of municipal utility mandates.
  5. E
    It serves as an intermediate conclusion derived from evidence about battery management software.

Answer

The bolded portion describes a historical practice that provides contextual background for the current regulatory transition and subsequent debate.
The correct answer accurately characterizes the bolded sentence as historical background context. The passage begins by explaining how grid operators historically managed demand surges. This information is non-evaluative situational context that frames the recent shift to battery storage and the debate regarding battery viability.

Step-by-Step Solution

1
Analyze the structural breakdown of the argument
Opening sentence = historical background; Second sentence = recent policy shift; Third sentence = critics' counter-premise; Final sentence = author's supporting premise and main conclusion.
Deconstructing the argument into functional claims isolates the specific role of each sentence.
2
Evaluate the functional role of the bolded statement
The bolded statement outlines past industry behavior (reliance on fossil-fuel plants) prior to recent battery storage mandates.
It does not provide evidence directly supporting or refuting the main conclusion about battery cost-effectiveness, but sets up the context.
3
Select the option matching this functional role
The correct response accurately states that the statement provides contextual background.
Background information sets the stage for an argument without functioning as a direct premise or conclusion.

Key Concept

Identifying Background Information and Contextual Claims
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Topics

Identifying Background Information and Contextual Claims

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