Most of Portugal’s 250,000 university students boycotted classes in a one-day strike to protest a law that requires them to contribute $330 a year toward the cost of higher education, previously paying $7 per year.
A.year toward the cost of higher education, previously paying $7 per year
B.year toward the cost of higher education, for which was previously paid $7 per year
C.year, compared to the previously $7 per year, toward the cost of higher education
D.year toward the cost of higher education, instead of the $7 per year required previously
E.year as opposed to the $7 per year required previously for the cost of higher education
參考答案為D,我選B
我覺得B的which 指代前面的cost of higher education
是因為for不需要嗎?
選項D,有大大可以解釋一下嗎?謝謝