Professor Hasan total his class that the method of student evaluation of teachers is not a valid measure of teaching quality.Students should fill out questionnaires at the end of the semester when courses have been completed. Which of the following,if true, provides support for professor Hasan's proposal ?
A. Professor Hasan received low ratings from the students.
B. Students filled out questionnaires after the midterm exam.
C. Students are not obligated to use the survey results
