Question

Impeachment charges are brought against government officials by which of the following?

Answer 1

The answer is B
The House of Representatives can initiate an impeachment, but to remove an official is up to the senate. 

Answer 2

Impeachment charges are brought against government officials by C. the House of Representatives.
It is the only body which has such authorities as to impeach someone. It can initiate the impeachment, whereas the Senate has the right to try such impeachments, but cannot start the whole process itself - it is what H.O.R. does.