In a system of ABCD conducting plates, each with area A, and consecutive plates separated by a distance d, the energy stored is in the ratio of:
A. 1/2 : 1 : 1/2
B. 1/4 : 1 : 1/4
C. 1/6 : 1 : 1/6
D. 1/8 : 1 : 1/8