A Relative Ranking System Is Used When

A relative ranking system is used when

A) students receive an A if they got 93% of the total points in a semester.
B) students receive weighted grades during a semester,like: 20 of 25 points on a quiz worth 5% of the grade,and 10 of 15 on a quiz worth 3% of the grade.
C) a college implements a system where 10% of the class will receive A,20% will receive B,70% will receive C,20% will receive D and 10% will receive F.
D) a student must take all quizzes to receive a C,a student must take all quizzes and write a paper to receive a B,and a student must take all quizzes,write a paper and do a presentation to receive an A.