Question

Which sentence should be revised to include commas to set off a nonrestrictive element?

Answer 1

D. The TV show, which we watch together, airs on Friday nights. is the grammatically correct version of the sentence. "which we watch together" gives further information about the show

Answer 2

The answer is D:

 The sentence The TV show which we watch together airs airs on Friday nights contains a restrictive clause that is essencial to the meaning of the sentence. But if we add commas after the word show and after the word together, we have a nonrestrictive clause. The words between the two commas are just information, are not essential to the meaning of the sentence.