thE mAin iDEA oF this pAssAgE is ______.
A．ExAminAtions ExErt A pErniCious inFluEnCE on EDuCAtion
B．ExAminAtions ArE inEFFECtivE
C．ExAminAtions ArE proFitABlE For institutions
D．ExAminAtions ArE A BurDEn on stuDEnts