What Has to Happen in Congress in Order for the President

What has to happen in Congress in order for the president to be impeached and removed from office?

A) The House must impeach the president by a simple majority;the Supreme Court must convict with a two-thirds vote.
B) The Senate must impeach the president by a simple majority;the House must convict with a two-thirds vote.
C) The House must impeach the president by a simple majority;the Senate must convict with a two-thirds majority.
D) The Supreme Court must impeach the president with a simple majority;the chief justice presides over a Senate trial that must convict with a two-thirds majority.