Which of the Following Led to a Year-Long Investigation by the House

Multiple Choice

Which of the following led to a year-long investigation by the House of Representatives during the Civil War?

A) It was learned that leading peace Democrats in the Senate gave top secret information to the Confederacy.
B) The press revealed that the secretary of state had ignored Confederate overtures for peace negotiations.
C) There were stories of war profiteering by contractors who sold inferior merchandise to the government at inflated prices.
D) It was learned that the secretary of war received kickbacks from government contractors.