F: I heard you went to Las Vegas. What did you do? ,M: Well, we went shopping a lot. We went and visited the Hoover Dam. ,F: That's a lot of water. Did you go swimming? ,M: No, it's not warm enough for that.
(A) F: Why didn't you go shopping in Las Vegas? (B) F: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that? (C) F: You failed to swim in Hoover Dam in Las Vegas but you swam in somewhere else there, right? (D) F: Why didn't you visit the Hoover Dam in Las Vegas?
B