GKFix MCQ Question

Why does the text mention that Ce⁴⁺ has a strong tendency to revert to the +3 state?

• A. Because Ce⁴⁺ is a strong oxidant
• B. Because Ce⁴⁺ is unstable
• C. Because Ce⁴⁺ cannot exist in solution
• D. Because Ce⁴⁺ has a larger ionic radius than Ce³⁺