Two instructors announced that they "grade on the curve," that is, give a fixed percentage of each of the various letter grades to each of their classes. Their curves are as follows:
Grade Instructor A Instructor B
A 10% 15%
B 15 15
C 45 30
D 15 20
F 15 20
If a random student came to you and said that his object was to enroll in the class in which he could expect the higher grade point average, which instructor would you recommend?