Directions: The following question tests your ability to recognize grammar and usage errors. The sentence contains either a single error or no error at all. The error, if there is one, is underlined and lettered. If the sentence contains an error, select the underlined part that must be changed to make the sentence correct. If the sentence is correct, select choice (E). In choosing the answer, follow the requirements of standard written English.

The teacher asked (A) the student if he (B) can explain the (C) sum to the (D) rest of the class. (E) No error