What Is the Process That Ensures Mitral and Tricuspid Valve

Multiple Choice

What is the process that ensures mitral and tricuspid valve closure after the ventricles are filled with blood?

A) Chordae tendineae relax, which allows the valves to close.
B) Increased pressure in the ventricles pushes the valves to close.
C) Trabeculae carneae contract, which pulls the valves closed.
D) Reduced pressure in the atria creates a negative pressure that pulls the valves closed.