To a Concentrated Buffer of PH 9

To a concentrated buffer of pH 9.0 was added an equal volume of a solution that was 0.20 M in each of the ions Ca²⁺, Cd²⁺, and Cu²⁺. The expected precipitate would consist of: salt: calcium hydroxide cadmium hydroxide copper(II) hydroxide
Ksp: 4.0 × 10^-6   2.0 × 10^-14   1.8 × 10^-19

A) only Ca(OH) ₂
B) only Cd(OH) ₂
C) only Cu(OH) ₂
D) only Cd(OH) ₂ and Cu(OH) ₂
E) Ca(OH) ₂, Cd(OH) ₂, and Cu(OH) ₂