Individual Senators Can Exercise Tremendous Power by Filibustering

Individual senators can exercise tremendous power by filibustering

A) unless a majority of the Senate votes to cut her or him off from speaking.
B) unless the party leader tells him or her to stop.
C) unless three-fifths of the senators vote to cut her or him off.
D) unless two-thirds of the senators vote to cut her or him off.
E) unless three-quarters of the senators vote to cut him or her off.