[单选题]
04.05: The potential h)hp +ny:j,cnenergy of two liq5jl)1bzvbr - ke charges
A. decreases as the charges are separated.
B. depends on the sign of the charge.
C. is proportional to the square of the relative speed.
D. is inversely proportional to the square of the separation.
E. is repulsive.
