Why Do Electron Groups Around a Central Atom Arrange Themselves

Multiple Choice

Why do electron groups around a central atom arrange themselves as far apart from one another as possible, while still remaining attached to the central atom?

A) Actually, electrons don't do this, but atoms do.
B) The like charges of the electrons attract each other.
C) The protons direct the electrons to do this.
D) The like charges of the electrons repel each other.
E) There is no reason for this arrangement; it is just observed to be that way.