The Following Anions Can Be Separated by Precipitation as Silver

The following anions can be separated by precipitation as silver salts: Cl^-, Br^-, I^-, and CrO₄^2-. If silver ions (Ag⁺) are added to a solution containing the four anions that are at concentrations of 0.10 M, in what order will they precipitate? $$\begin{array} { l l } \text { Compound } & K _ { \mathrm { sp } } \\\hline \mathrm { AgCl } & 1.8 \times 10 ^ { - 10 } \\\mathrm { Ag } _ { 2 } \mathrm { CrO } _ { 4 } & 1.1 \times 10 ^ { - 12 } \\\mathrm { AgBr } & 5.4 \times 10 ^ { - 13 } \\\mathrm { AgI } & 8.5 \times 10 ^ { - 17 }\end{array}$$

A) AgCl ? Ag₂CrO₄ ? AgBr ? AgI
B) AgI? AgBr ? Ag₂CrO₄ ? AgCl
C) Ag₂CrO₄ ? AgCl ?AgBr ?AgI
D) Ag₂CrO₄ ? AgI ? AgBr ? AgCl
E) AgI ? AgBr ? AgCl ?Ag₂CrO₄