Answer:
Which sentence contains a nonrestrictive clause?
A). Be sure to watch that movie I gave you.
B). The man who drives our bus is ill.
C). Take a left after that house with the yellow fence.
D). The old apron, which belonged to Mama, is torn.
The answer is D.
Explanation:
Non-restrictive sentences unnecessarily describe a noun (The sentence is clear without that extra description.).
