Guess what , I ' m not in shape , and I walked there and back . It was 5:30 by the time I got to campus , and after seven by the time I got back . Really , when I did finally get to campus , I did n't do anything because I do n't know where anything is , and I was pretty darn exhausted . All I did on campus was use a drinking fountain and call my brother and rest on a lawn .

Question: Why is the narrator so tired ?
Answer: They were studying all night at the campus library .They are not in great physical condition .They went to the campus library and studied all night .None of the above choices .