The correct answer is C. Colligative properties only depend upon the number of solute particles in a solution but not on the identity or nature of the solute and solvent particles. I hope this anwers your question.
If pH is increased then concentration of increases in solution resulting removal of by forming . Hence, according to Le-chatelier principle, equilibrium will shift towards right. So more will dissolve
If is added then concentration of increases in solution resulting shifting of equilibrium towards left in accordance with Le-chatelier principle. So less will dissolve
Insoluble precipitate of AgOH is formed by adding NaOH in solution resulting removal of . So, more will dissolve