The correct answer is B. If the United States President is suspected of certain high crimes, the House of Representatives may choose to indict them or impeach him.
An impeachment designates a figure of law through which charges can be brought against a high government official. Congress must approve the prosecution and subsequently handle the trial of the accused. Once an individual has been subject to an impeachment process he has to face the possibility of being condemned by a vote of the legislative body, which would cause his removal and disqualification for similar functions.
Article One of the Constitution of the United States guarantees that high officials can be prosecuted by mandate of the House of Representatives because of serious crimes, with the exception of members of the legislature. Once the Congress opens the process, it is the Senate that is in charge of carrying out the trial. To condemn the accused, two thirds of the votes of the senators are necessary. This eventual punishment consists of the dismissal of the accused and his disqualification from holding other public positions.
In the United States, of fourteen impeachment proceedings initiated at the federal level, only four ended with a condemnatory resolution. Only two presidents have been tried through this procedure, Bill Clinton (1998-1999) and Andrew Johnson (1868), and both were acquitted. Richard Nixon interrupted the process by resigning his post in 1974 after the approval of his impeachment.
Destitution processes can also be done at the state level, but they have been very few.