What is the overall voltage for a redox reaction with the half-reactions Mg(s) Mg2+ + 2e- and Cu2+ + 2e- Cu(s)?
A.-2.37 - 0.34
B.0.34 - 2.37
C.0.34 - (-2.37)
D.2.37 - 0.34
A.-2.37 - 0.34
B.0.34 - 2.37
C.0.34 - (-2.37)
D.2.37 - 0.34