Choose the best answer

Question 13.   
a. Andy: Not at all. My school performance is a huge worry for me.
b. Andy: Hi, Anna! Long time no see. Is your study OK?
c. Anna: Hi, Andy! It's quite good. How about you?
A. a-c-b                       B. c-b-a                                   C. b-c-a                                   D. c-a-b