My phone’s not working! _______

My phone’s not working! _______
A、What’s it made of?
B、How much is it?
C、What's the matter?
【正确答案】：C
【题目解析】：C选项“What's the matter?”是在询问手机出了什么问题，这直接对应了“手机坏了”这一情境，表达了对手机问题的关心，因此是正确的回应。