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A
To entertain the reader with a story
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B
To persuade the reader to buy energy-efficient appliances
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C
To explain how appliances are manufactured
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D
To compare two brands of appliances
Why this is the answer
Author's-purpose questions ask why the passage was written. The language here — listing benefits and urging 'Why wait? Make the switch today' — is designed to persuade the reader to act, specifically to switch to energy-efficient appliances. The persuasive call to action and emphasis on benefits reveal the intent. The passage does not tell a story (entertain), explain manufacturing, or compare brands. Recognizing persuasive cues — benefits, urgency, and a call to action — identifies the purpose as persuasion.
Source: ASVAB Paragraph Comprehension — Author's Purpose