The critics of the decision to discontinue the coinage of silver called that decision the " of '73."

Crime of ’73. 

In 1873 Congress had established the Coinage Act of 1873 (or Mint Act of 1873) which was a general revision of a law that led to the discontinuation of  the minting of silver dollars. It was later denounced and  referred to as Crime of ’73 by the people who wanted inflation.

the correct answer for the first is d

explanation: d