F: Adam, I called your home this morning but I couldn't get through. Was there anything wrong with your phone? ,M: I was at an art exhibition. I had it turned off before I entered the exhibition hall.
(A) F: So you didn't bring your phone when you go to the cinema this morning. (B) F: I’m sorry, I don’t understand. Could you say it again? (C) F: Alright. I understand it's a manner to turn off phone at an exhibition. (D) F: I see, Tom. You couldn't answer because your phone was somehow broken.
C