Claudia and Hideki Are Math Students

Claudia and Hideki are math students.Claudia has a promotion orientation,whereas Hideki has a prevention orientation.What is the best way to make them both continue to put in effort to learn math?

A) Give both students a very difficult math test that's rigged to make them do poorly.
B) Give both students a very easy math test that's rigged to make them do well.
C) Give Claudia a very easy math test so she's rigged to do well,but give Hideki a very difficult math test so he's rigged to do poorly.
D) Give Claudia a very difficult math test so she's rigged to do poorly,but give Hideki a very easy math test so he's rigged to do well.
E) Give both students a very easy math test,but don't tell them their scores.