A point charge $q$ is at distance $d$ from an infinite grounded conducting plane. The force exerted on the charge is:
(A)
\frac{1}{4\pi\epsilon_0} \frac{q^2}{4d^2} \text{ (attractive toward plane)}
(B)
\frac{1}{4\pi\epsilon_0} \frac{q^2}{d^2} \text{ (repulsive)}
(C)
0
(D)
\frac{1}{4\pi\epsilon_0} \frac{q^2}{2d^2} \text{ (attractive)}