Question

which sentence contains a nonrestrictive clause?

be sure to watch that movie i gave you.

the man who drives our bus is ill.

take a left after that house with the yellow fence.

the old apron, which belonged to mama, is torn.

Explanation:

A nonrestrictive clause provides extra, non - essential information and is set off by commas. In "The old apron, which belonged to Mama, is torn", the clause "which belonged to Mama" is nonrestrictive as it adds extra info about the apron and is separated by commas. The other options have restrictive elements (the first three clauses are essential to identify the noun).

Answer:

D. The old apron, which belonged to Mama, is torn.