Determine Which of the Following Pairs of Reactants Will Result

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25 °C.

A) I^-(aq) + Zn²⁺(aq) ; if E^o(I₂/I^-) = + 0.54V and E^o(Zn²⁺/Zn) = -0.76V
B) Ca(s) + Mg²⁺(aq) ; if E^o(Ca²⁺/Ca) = -2.76V and E^o(Mg²⁺/Mg) = -2.37V
C) H₂(g) + Cd²⁺(aq) ; if E^o(Cd²⁺/Cd) = -0.40V
D) Ag(s) + Sn²⁺(aq) ; if E^o(Ag⁺/Ag) = + 0.80V and E^o(Sn²⁺/Sn) = -0.14V
E) Ag⁺(aq) + Mn²⁺(aq) ; if E^o(Ag⁺/Ag) = + 0.80V and E^o(MnO₄^-/Mn²⁺) = +1.51V