For those students looking tp bump up their grade point averages during college , the answer may not be spending more time in a library or study hall , but in a gym. New michigan state university research shows that students who were members of the recreational sporys and fitness centers on msu 's campus during their freshman and sophomore years had higher gpas than those weren't. The research also indicated that students with memberships stayed in school longer. An increase of 3.5 percent in two year retention rates was seen among this group
According to the passage , college students might get better grades if they
A. Spend additional time in the library
B. Are physically active
C. Live on campus
D. Study more