The correct answer is cloture.
Impeachment is a process in which a legislative body charges an elected official with committing a crime.
A majority simply describes what is needed in order for a bill to pass in Congress.
A filibuster refers to an action taken by people in the legislature that would delay a vote. In the United States, this is usually done through a series of extremely long speeches.
This shows that the only correct answer can be cloture.
