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. Lan: And when they type on tablets, they can change or add more things any time they want.
b. Lan: I think electronic devices make school life easier and more enjoyable.
c. Minh: Exactly. Students who hate homework can have fun doing it on tablets.