Choose the answer that is correct and clearly expressed in Standard English.

Solar panels cost thousands of dollars to install. ______ a typical household recovers that cost through lower electricity bills over time.

Answer and explanation

Correct answer: A. Nevertheless,

  1. Step 1: The first sentence states a drawback (high cost); the second states a benefit.
  2. Step 2: The relationship is contrast, so the transition must signal contrast.
  3. Step 3: Nevertheless signals that the benefit holds despite the cost.
Answer
Nevertheless,.
Why not the others: Therefore signals a result, For example introduces an instance, and Similarly signals likeness; none of them fits a contrast.

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