Extrapolating from the Walton and Cohen (2011)study of Belongingness Uncertainty

Extrapolating from the Walton and Cohen (2011) study of belongingness uncertainty and academic performance, knowing that feeling insecure at the outset of one's freshman year is normal and temporary should help

A) all students perform better throughout all the years of college.
B) African-American, but not Caucasian, students perform better throughout all the years of college.
C) all students perform better during their freshman year, but not much beyond that.
D) African-American, but not Caucasian, students perform better during their freshman year, but not much beyond that.