There Are Certain Rules That Apply to the Filibuster in the Texas

There are certain rules that apply to the filibuster in the Texas Senate that are quite different from those in the U.S. Senate. Which of the following is NOT one of those rules?

A) There is no eating or drinking during a filibuster.
B) Senators must stand at their desks and may not lean, sit, or use their desks or chairs in any way.
C) Remarks must be confined to the issue under consideration.
D) One must speak in an audible voice.
E) There is one seven-minute bathroom break.