Đơn giản các phân thức sau đây:

a) 2 y 3 − y 2 − 2 y + 1 y 3 + 3 y 2 − y − 3  với  y ≠ − 3  và  y ≠ ± 1 ;

b) m 4 − n 4 n 3 − m 3  với  m ≠ n .

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions from 48 to 50.

Martin will no longer be able to attend the university now that the tuition fees have increased so much.

A. After the raise in the tuition fees, they become unaffordable for Martin, who will now have to leave the university.

B. The university should never have made the tuition fees so expensive, as now Martin will have to drop out.

C. With the tuition fees being so high after the recent increase, Martin is thinking of quitting the university.

D. It will be difficult for Martin to continue attending the university with these costly tuition fees.