Consider the Following Standard Reduction Potentials

Multiple Choice

Consider the following standard reduction potentials:
2H⁺(aq) + 2e^- H₂(g) ; E° = 0.00 V
Sn²⁺(aq) + 2e^- Sn(s) ; E° = -0.15 V
Cd²⁺(aq) + 2e^- Cd(s) ; E° = -0.40 V
Which pair of substances will react spontaneously under standard-state conditions?

A) Cd with H⁺
B) Cd with Sn
C) Sn²⁺ with Cd²⁺
D) Sn with Cd²⁺
E) Sn²⁺ with H⁺