When Equal Volumes of the Indicated Solutions Are Mixed, Precipitation

When equal volumes of the indicated solutions are mixed, precipitation should occur only for: barium fluoride 1.0 × 10^-6 calcium carbonate 2.8 × 10^-9
Calcium fluoride 5.3 × 10^-9
Magnesium fluoride 3.7 × 10^-9
Silver carbonate 8.5 × 10-12

A) 2 × 10^-5 M Ag⁺ + 2 × 10^-5 M CO₃^2-
B) 2 × 10^-4 M Ca²⁺ + 2 × 10^-4 M CO₃^2-
C) 2 × 10^-5 M Ca²⁺ + 2 × 10^-3 M F-
D) 2 × 10^-5 M Mg²⁺ + 2 × 10^-6 M F-
E) 2 × 10^-3 M Ba²⁺ + 2 × 10^-3 M F-