A Saturated Sodium Carbonate Solution at 0°C Contains 7

A saturated sodium carbonate solution at 0°C contains 7.1 g of dissolved sodium carbonate per 100.mL of solution. The solubility product constant for sodium carbonate at this temperature is

A) 1.2
B) 0.30
C) 3.0 * 10^-4
D) 0.90
E) 1.2 * 10^-3