Choose the sentence that correctly punctuates the restrictive or non-restrictive clause:
Answer and explanation
Correct answer: C. The solar panels that were installed on the southern roof generated twenty percent more electricity.
- Step 1: Restrictive clauses define essential identification and take 'that' without surrounding commas.
- Step 2: 'that were installed on the southern roof' identifies which specific panels are meant and is correctly unpunctuated.
Answer
The solar panels that were installed on the southern roof generated twenty percent more electricity.
Why not the others: Restrictive clauses using 'that' cannot take commas; the other options omit closing commas or misuse 'which'.
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