**Which sentence is correctly punctuated?**
AThe plan which was approved last week, is finally being implemented.
BThe plan, which was approved last week is finally being implemented.
CThe plan, which was approved last week, is finally being implemented.
DThe plan which was approved, last week is finally being implemented.
Answer & Solution
Correct answer: C. The plan, which was approved last week, is finally being implemented.
The clause 'which was approved last week' is a non-restrictive relative clause — it provides extra info but isn't essential to identify 'the plan'. Non-restrictive clauses are set off by COMMAS ON BOTH SIDES. Option C has commas on both sides; others are missing one comma or misplaced.
Related questions
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Correct: