Calculate the Concentration of Malonate Ion (C₃H₂O₄^2-) in a 0

Calculate the concentration of malonate ion (C₃H₂O₄^2-) in a 0.200 M solution of malonic acid (C₃H₄O₄) . (For malonic acid, K_a1 = 1.4 × 10^-3, K_a2 = 2.0 × 10^-6.)

A) 2.8 × 10^{-4 M}
B) 0.016 M
C) 1.8 × 10^{-4 M}
D) 1.4 × 10^{-3 M}
E) 2.0 × 10^{-6 M}