Which Student Is Using Selective Optimization with Compensation

Which student is using selective optimization with compensation?

A) Jacob, who allots special time to studying his most difficult courses, and works especially hard in his major where good grades matter most
B) Jorma, who selects only the easiest courses, doesn't study especially hard, and still manages to get a relatively high grade
C) Jarmila, who is so optimistic that she doesn't feel she has to study very much
D) Jill, who enrolls in the most difficult classes and then overcompensates by working around the clock