Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges
Jenifer and Susan are talking about a book they have just read.
Jennifer: "The book is really interesting and it's hard to put it down."
Susan: “______________”
A. I couldn't agree with you more.
B. It's alright.
C. Don't mention it.
D. That's nice of you to say so.