A Capacitor Consists of a Set of Two Parallel Plates

A capacitor consists of a set of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery and charged until its plates carry charges +Q and -Q. If the separation between the plates is doubled, the electrical energy stored in the capacitor will

A) double.
B) quadruple.
C) be cut in half.
D) be cut in fourth.
E) not change.