求教英语选择题,这道题为什么选D

题目

求教英语选择题,这道题为什么选D
George:You’re not looking very cheerful.__________?
Joe:Oh,nothing in particular.I’m just a bit fed up.
George:With your job?
Joe:Yes,that’s right.
A.Are you OKx05x05x05x05x05x05
B.Are you feeling wellx05
C.How are youx05x05x05x05x05
D.What’s the matter with you

答案

AB的问题回答都是yes 或者no how are you?是打招呼的用语
最后一个问,你怎么了?回答是,没怎么