GKFix MCQ Question

What does the text suggest is the primary factor influencing the E° value for the Ni²⁺/Ni couple?

• A. The low ionization energies of Ni
• B. The stability of the Ni²⁺ ion's d⁸ configuration
• C. The exceptionally high negative hydration enthalpy of Ni²⁺
• D. The low atomic mass of Ni