In a famous speech, William Jennings Bryan

A. declared that mankind shouldn't be "crucified on a cross of gold."
B. refused to be allied with the so-called "silverists."
C. declared his staunch support of the gold standard.
D. refused his nomination as the presidential candidate of the Populist Party.

Is it A?

Right.

From the article I read on Wikipedia, I think it's C.

Okay. Are these sites trustworthy?

Read the first paragraph carefully, Brooke.

http://en.wikipedia.org/wiki/Cross_of_Gold_speech

Yes. Wikipedia is trustworthy on statements of fact. The speech is a matter of public record.

Yes, you are correct. In a famous speech known as the "Cross of Gold" speech, William Jennings Bryan declared that mankind shouldn't be "crucified on a cross of gold." This speech was delivered at the 1896 Democratic National Convention and is one of Bryan's most well-known speeches. In it, he expressed his support for bimetallism, a monetary system that would include both gold and silver as the basis for currency, as opposed to the gold standard that was in place at the time. Bryan's speech was a powerful critique of the existing economic system and made him a prominent figure in the Populist movement.