Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
John: "Do you think that we should use public transportation to protect our environment?"
Laura. "________"
A.Yes, it’s an absurd idea
B. There’s no doubt about it
C. Of course not. You bet
D. Well, that’s very surprising
Đáp án là B. Tôi không nghi ngờ về nó adsure: vô lí. you bet = you're welcome