Which statement is true?

A. The Sherman Silver Purchase Act was related to the sale of silver in the U.S. Treasury to private investors.
B. The Bland-Allison Act was related to the purchase of gold by the federal government.
C. The Credit Mobilier was a government agency that was established to use silver to back the currency of the United States.
D. The Pendleton Act was related to the reformation of the federal labor force.
i need an answer quick, please help.