Combine your understanding of solubility and K_sp to explain why calcium carbonate (CaCO₃) is less soluble in seawater compared to freshwater.

• A. Seawater has a lower concentration of ions, decreasing Q and causing dissolution.
• B. Seawater has a higher temperature, increasing K_sp and solubility.
• C. Seawater has a lower temperature, decreasing K_sp and solubility.
• D. Seawater has a higher concentration of ions, increasing Q and causing precipitation.

Answer: (D)