求解GWD1套上两道题~

Q11:

Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people to donate $500 each to Mary’s campaign.  If no one donated more than once and if there were no other donations, what was the value of n?

(1)     The first n people donated 1/16 of the total amount donated.

(2)     The total amount donated was $120,000.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient

这题为什么答案选E?题目是讲mary找了N个人,每人捐500,那N个人又继续找N个人每人捐五百,然后继续循环,是这样么?那我觉得应该选C啊...

如果题目没有错的话，我觉得应该选C