81. Calculate E°cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.  Overall reaction: MnO4–(aq) + 2H2O(l) + 3Co2+ (aq) MnO2(s) + 3Co3+(aq) + 4OH– (aq)
(A) E°cell = –1.23 V, spontaneous
(B) E°cell = –1.23 V, nonspontaneous
(C) E°cell = 1.23 V, spontaneous
(D) E°cell = 1.23 V, nonspontaneous
(E) E°cell = –0.05 V, nonspontaneous