单项选择题

M: Sally! Sally! Could you please turn off the radio I hate to have to say this, but it’s too noisy here.
W: What But...
M: You know I’m reading my books and I’m preparing for my English exam this afternoon.
W: I know that. But I’m not listening to the radio. The noise comes from our neighbours upstairs.
M: Oh! How terrible! I’ll talk to them and let them be quiet!

Why is the man so annoyed()

A.Because he didn’t like listening to radio.
B.Because his sister made him study very hard.
C.Because the noise disturbed him so much.