What is the Chinese enrollments at U.S. colleges in 2013/14? A: 157,558 B: 235,597 C: 274,439 D: 194,029

Enrollments in doctoral programs are promoted by universities mainly because they need （） A: the cheap labor of the students B: to show high academic standard C: to attract enough full-time professors D: the talented hands to help with research

The enrollments at College X and College Y both grew by 8 percent from 1980 to 1985. If the enrollment at College X grew by 800 and the enrollment at College Y grew by 840, the enrollment at College Y was how much greater than the enrollment at College X in 1985 ？（） A: 400 B: 460 C: 500 D: 540 E: 580