The correct answer is C) accepting bribes.
President Grant's Secretary of War was accused of accepting bribes during his administration.
The Secretary of War in the Ulysses S. Grant cabinet was William W. Belknap. As a member of the President cabinet in an important position, he knew that he was accountable for his actions. So when the firsts rumors of corruption act and accepting bribery where heard, it shocked General Grant. He was impeached by the Democrats but the members of the Senate did not reach the two-thirds needed to convict him.