Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17.

a. Sarah: I've heard about it, but I'm not sure yet.
b. Brian: It's a great way to gain experience and help the community.
c. Sarah: That sounds interesting. What kind of work do they do?
d. Brian: Mostly teaching kids and organizing weekend activities.
e. Brian: Are you going to join the volunteering project this summer?