The reduction potentials for the +2 cations, e.g. A2+ + 2e– → Ao, of four metals decrease in the ord — Electrochemistry Chemistry Question

The reduction potentials for the +2 cations, e.g. A²⁺ + 2e– → Ao, of four metals decrease in the order A, B, C, D. Which statement(s) is/are true?