Which of the Following Is a Reason to Grade

Which of the following is a reason to grade?

A) Grades mean different things to different teachers.
B) Physical education should make sweeping changes regarding the manner in which youth are evaluated.
C) Grades are the common denominator to signify students' performance.
D) Professional preservice and in-service preparation in the area of measurement and evaluation are lacking.
E) All of the above are reasons to grade.