What Is the Water Solubility of BaCO₃ (K_sp = 2

What is the water solubility of BaCO₃ (K_sp = 2.6 × 10−⁹) in a solution containing 0.20 M CO₃^2-(aq) ?

A) 5.2 × 10−¹⁰ M
B) 1.3 × 10−⁸ M
C) 5.1 × 10−⁵ M
D) 2.5 × 10−⁴ M
E) 1.0 × 10−⁵ M