From the last two paragraphs, we learn that ______
A.
If the margin of profit in student-loan is lessened, no company will be involved in the industry.
B.
If the margin of profit in student-loan is lessened, Sallie Mae will be bankrupt.
C.
If the margin of profit in student-loan is lessened, Sallie Mae can get more opportunities.
D.
If the margin of profit in student-loan is lessened, the industry will be definitely safe.