The Equilibrium Constant at 25 ^$\circ$ C for the Dissolution of Silver Iodide Is
8

The equilibrium constant at 25 ^$\circ$ C for the dissolution of silver iodide is
8.5 $\times$ 10^-17.AgI(s) Ag⁺(aq) + I^-(aq)
If an excess quantity of AgI(s) is added to water and allowed to equilibrate,what is the equilibrium concentration of I^-?

A) 7.2 $\times$ 10^-33 M
B) 4.3 $\times$ 10^-17 M
C) 8.5 $\times$ 10^-17 M
D) 6.5 $\times$ 10^-9 M
E) 9.2 $\times$ 10^-9 M