Which statement is the contrapositive of:
If two angles are vertical angles, then they are not adjacent angles.

A.If two angles are not adjacent angles, then they are vertical angles.

B.If two angles are not vertical angles, then they are adjacent angles.

C.If two angles are not vertical angles, then they are not adjacent angles.

D.If two angles are adjacent angles, then they are not vertical angles.

E.Two angles are vertical angles if, and only if, they are not adjacent angles.