대화를 듣고 남자가 여자의 연락에 답을 못한 이유를 고르시오. (3점)

Sue: Hey John. what happened yesterday?
John: Exactly, my phone was...
Sue: Do you have another girlfriend?
John: No, just...
Sue: Did you go to a love live concert yesterday?
John: No, I stopped...
Sue: Was it your friend's relative's dog's birthday party?
John: It was last week.
Sue: Did you travel around the world?
John: Wtf...
Sue: Then what happened yesterday?
John: There was a fire in Kakao Talk.