37.

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

in charge of sth, fixed collocation, no symbols in the middle, A/C error. According to the meaning of the sentence, "He hired Howe, who was in charge of cleaning the photo room, to help shoot this scene", so to help is a modification of the main clause, so the attributive clause ends after room and needs a comma, D is correct.