某一 Galvanic cell 的反應式如下：MnO4−(aq) + H+(aq) + ClO3−(aq) → ClO4−(aq) + Mn2+(aq) + H2O(l)其半反應式為：MnO4− + 5e– + 8H+ → Mn2+ + 4H2O ε° = 1.51VClO4−+ 2H+ + 2e– → ClO3− + H2O ε° = 1.19V反應式係數平衡後，反應式之係數總合與ε°分別為何？
(A) 24, ε° = 2.70 V
(B) 21, ε° = –0.19 V
(C) 23, ε° = –2.93 V
(D) 22, ε° = –0.32 V
(E) 23, ε° = 0.32 V