Why Is It Unnecessary for an Agenda Setter to Have

Why is it unnecessary for an agenda setter to have complete control of debate and proceedings?

A) They will be listened to less if they have complete agenda setter control.
B) Members are more likely to proceed quickly without complete agenda setter control.
C) The agenda setter does need complete control of the proceedings.
D) The agenda setter can veto undesirable options after passage.
E) The available options are limited by the agenda setter before debate begins.