M: Maria, do you think it's useful to study English abroad? ,F: Certainly, but it costs too much. In fact, if we do our best we can also become great English speakers in our country.
(A) M: I agree with you. Studying French is useful and necessary. (B) M: Yes, studying Spanish aboard is useful but expensive. (C) M:  I am not surprised that you have the idea that studying English aboard is useful but costs too much. (D) M: I am really sorry, I did not catch that. Would you slow down, please?
C