prove的用法问题 求NN指教~

The United States minted about 857million silver-colored “Susan Anthony” dollars between 1979 and 1981, but thecoinproved unpopular because it looked and felt too much like a quarter.

A.    The United  States minted about 857 millionsilver-colored “Susan Anthony” dollars between 1979 and 1981, but the coin

B.    About 857 million silver-colored “Susan Anthony” dollarswere minted as coins in the United  States between 1979 and 1981 but

C.   About857 million silver-colored “Susan Anthony” dollars that were minted between1979 and 1981 in the United  States

D.   About857 million silver-colored “Susan Anthony” dollars that the United Statesminted between 1979 and 1981

E.    Between1979 and 1981 the United States minted about 857 millio nsilver-colored “Susan Anthony” dollars, which