It can be inferred from the passage that major universities are trying to tighten their grading standards because they believe（）.

A.rewarding poor performance may kill the creativity of students

B.punishment is more effective than rewarding

C.failing uninspired students helps improve their overall academic standards

D.discouraging the students’ anticipation for easy rewards is a matter of urgency

正确答案：rewarding poor performance may kill the creativity of students