M: Why didn't you call me yesterday? I was waiting by the phone all day. W: I'm sorry, I couldn't call. I couldn't find a phone. M: What do you mean you couldn't call? You have a cell phone, don't you? W: I used to have a cell phone. The teacher took it away because I tried to call you from class., Question: Why didn't the woman call the man yesterday? (A) She lost her cellphone. (B) Her cellphone was power off. (C) Her teacher took her cellphone away.
(C) Her teacher took her cellphone away.