W: Why didn't you come to the cinema last night? I waited for you for a long time. M: I'm sorry, but I had something more important to do yesterday evening, so I wasn't able to come. W: But why not tell me? M: I did. I called you many times, but you had your mobile phone power off. W: Oh, I didn't bring it with me because I left it recharging at home. M: I'm really sorry to have missed the film., Question: Why couldn't the man keep in touch with the woman last night? (A) The woman's mobile phone was stolen. (B) The woman's mobile phone was power off. (C) The man had something important to do.
(B) The woman's mobile phone was power off.