Order to Encourage Students Who Are Concerned Abouttheir GPAs to Take

order to encourage students who are concerned abouttheir GPAs to take harder classes, professors of theseclasses should:

A) grade on a curve because it increases students' incentive to study even when the material may be
Hard.
B) grade on a curve because it increases students' incentive to study even when some students in the class
May be smarter than others.
C) not grade on a curve because grading on a curve will only serve to reduce students' incentive to study,
Particularly if the material is hard.
D) not grade on a curve because grading on a curve will only serve to attract lower-level students who are less
Likely to study.