What Is the Concentration of [Ag⁺] in a Saturated Solution

What is the concentration of [Ag⁺] in a saturated solution of AgI? The K_sp of AgI is 9.50 × 10⁻¹⁷.

A) 9.75 × 10⁻⁹ M
B) 2.92 × 10⁻¹⁰ M
C) 6.20 × 10⁻¹⁰ M
D) 2.60 × 10⁻⁹ M
E) 2.29 × 10⁻⁹ M