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. Alice: Hey, how have your classes been this week?
b. Alice: That sounds tough! I've been busy with my essays, but I'm trying to manage my time better.
c. Bob: They've been challenging, especially in science. I have a lot of homework!