Which of the following is FALSE when considering van der Waals interactions?

A) The van der Waals radius represents the most stable distance between two interacting centers.
B) Van der Waals radii can determine molecular surfaces.
C) Molecules that interact by van der Waals forces do not interpenetrate.
D) The total interaction energy is the sum of the attractive and repulsive forces.
E) They are not important in determining the stability of three-dimensional structures of proteins.