How Does Ebstein's Anomaly Lead to a Small Right Ventricular

How does Ebstein's anomaly lead to a small right ventricular chamber?

A) The mitral valve leaflets push into the right ventricle, creating a small right ventricular chamber.
B) A displaced tricuspid valve lowers into the right ventricle, creating a small right ventricular chamber.
C) The pulmonic valve pushes into the right ventricle, creating a small right ventricular chamber.
D) The aortic valve pushes into the right ventricle, creating a small right ventricular chamber.