Consider the Reaction A(aq) $\rightleftharpoons$ 2 B(aq) Where K_c = 4

Consider the reaction A(aq) $\rightleftharpoons$ 2 B(aq) where K_c = 4.1 at 25 °C. If 0.50 M A(aq) and 1.5 M B(aq) are initially present in a 1.0 L flask at 25 °C, what change in concentrations (if any) will occur in time?

A) [A] will decrease and [B] will decrease.
B) [A] will decrease and [B] will increase.
C) [A] will increase and [B] will decrease.
D) [A] will increase and [B] will increase.
E) [A] and [B] remain unchanged.