Judging from the Brief Descriptions Below,which One of These Four

Multiple Choice

Judging from the brief descriptions below,which one of these four teachers is using a mastery learning approach?

A) Ms. Alfonso gives examinations in which different students are asked different questions,depending on individual students' needs and interests.
B) Mr. Bryant assigns term papers and oral reports rather than in-class examinations.
C) Ms. Carroll uses the highest four of a student's six exam scores to determine course grades.
D) Mr. Dickson insists that students pass each test at the 80% level before beginning the next unit.