Command of Evidence: Textual

SAT Reading and Writing· difficulty 2/5

A team of engineers claims that a new battery design retains more capacity over many charge cycles than current commercial batteries.

Which finding, if true, would most strongly support the engineers' claim?

  • A

    The new battery design uses widely available materials.

  • B

    Battery research has been funded by both public and private sources.

  • C

    Many devices currently rely on lithium-ion batteries.

  • D

    After 1,000 charge cycles, prototype batteries with the new design retained 92 percent of original capacity, while standard batteries retained 70 percent.

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Explanation

A directly compares capacity retention between the new and standard designs after the same usage. B, C, and D are tangential.

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