Sentence Correction

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

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

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

C. About 857 million silver-colored “Susan B. Anthony” dollars that were minted between 1979 and 1981 in the United States

D. About 857 million silver-colored “Susan B. Anthony” dollars that the United States minted between 1979 and 1981

E. Between 1979 and 1981 the United States minted about 857 million silver-colored “Susan B. Anthony” dollars, which

Please explain your answers?

imo A
b-passive

c,d - shows out of x $ minted,857 were unpopular
e- akward+which

I am also with Vivek
ie A

B
dollars were minted as coins
its incorrect


C
we have it in non underlined part
so we needa clear antecedent of it
which is coin
and C does not mention about coins

also
dollars that were minted between 1979 and........
is looking weird


D
no antecedent for it

E
incorrectly means that dollars proved unpopular
also coins is missing

I understand this question, but can someone explain the usage of proved? Why does this proved not use the passive voice?
Thanks in advance!