Mark the letter A, B, C, or D on your answer sheet...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Mr. Collin is speaking to his student, Brian.
Mr. Collin: "You've been making very good progress. I'm proud of you!"
Brian: "___________"

A. No problem

B. Don't worry about it!

C. Everything's alright. Thank you.

D. I really appreciate you saying that.