Questions 17 to 20 are based on the following introduction of American students. You now have 20 seconds to read Questions 17 to 20. why are students enthusiastic for positions in student organizations

A．Because they hate the constant pressure and strain of their study.
B．Because they will then be able to stay longer in the university.
C．Because such positions help them hunt better jobs.
D．Because such positions are usually well paid.