Which sentence contains a non-restrictive relative clause correctly punctuated with commas?
Answer and explanation
Correct answer: B. The Gothenburg central library, which opened in 1954, houses over one million volumes.
- Step 1: Non-restrictive relative clauses provide non-essential parenthetical information and must be enclosed in commas, typically introduced by 'which'. Step 2. 'The Gothenburg central library, which opened in 1954, houses...' is properly set off with paired commas. Answer: The Gothenburg central library, which opened in 1954, houses over one million volumes. Why not the others: 'That' is used for restrictive clauses without commas; omitting commas around a non-restrictive clause is incorrect.
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