W: Come to the movies with us. Everybody needs to take a break every once in a while. M: I guess I might as well. I've been studying so long I just can't concentrate., Question: Why can't the man concentrate on his study? (A) He keeps thinking of going to the movies. (B) His classmates are taking a break. (C) He's been studying for too long.
(C) He's been studying for too long.