Question

Which of the sentence contains a correctly punctuated parenthetical phrase?

Answer 1

Answer:

The answer is C, "Dr. Jonas Salk, a medical researcher from New York, developed the first effective polio vaccine."

Explanation:

The other answers are not punctuated correctly. The first one should have a comma after "piece", the third one should have a comma after "class", and the fourth one shouldn't have a comma at all.

Answer 2

Answer:

The last one

Explanation:

First one is not punctuated correctly

Second is appositive

Third is appositive

Fourth is the only one that makes sense