这题到底该选啥啊？？谁跟谁对称呢？？

yaoxiayi

According to a 1996 survey by the National Association of College an University Business Officers, more than three times as many independent institutions of higher education charge tuition and fees of under $8,000 a year than those that charge over $16,000.
A) than those that charge
B) than are charging
C) than to charge
D) as charge
E) as those charging

Luxe

是不是选E呢，超过3倍的 学校