What Is the Solubility of Barium Sulfate in a Solution $\times$

What is the solubility of barium sulfate in a solution containing 0.050 M sodium sulfate? The K_sp value for barium sulfate is 1.1 $\times$ 10^-10.

A) 7.4 $\times$ 10^-6 M
B) 5.5 $\times$ 10^-11 M
C) 1.0 $\times$ 10^-5 M
D) 2.2 $\times$ 10^-9 M
E) 1.1 $\times$ 10^-10 M