Determine the Molar Concentration of Cl^- Ions in a 1 $\times$

Determine the molar concentration of Cl^- ions in a 1.00 M solution of AgCl₂^- with no excess silver ions. (K_f = 2.5 $\times$ 10⁵ for AgCl₂^-)

A) 0.020 M
B) 0.0040 M
C) 3.2 $\times$ 10^-2 M
D) 2.5 $\times$ 10^-2 M
E) 2.5 $\times$ 10⁵ M