In a Reversible Reaction A $\leftrightarrows$ B at a Particular Temperature, the Rate Constant for the Temperature

In a reversible reaction A $\leftrightarrows$ B at a particular temperature, the rate constant for the reverse reaction is twice the rate constant for the forward reaction. At equilibrium, how are the concentrations of A and B related?

A) Can't tell, need more information.
B) [A] = [B]
C) [A] = 2 *[B]
D) [A] = $\frac { 1 } { 2 } \times$
[B]
E) [A] = 4 *[B]