28. After electrolyzing a certain concentration of copper sulfate solution with an inertelectrode at a certain temperature for a certain period of time, 0.1 mole of basiccopper carbonate [Cu2(OH)2CO3] is added to the resulting solution, and theconcentration and pH are restored to exactly the same level as before electrolysis(without considering the dissolution of carbon dioxide). What is the total numberof electrons transferred during the electrolysis?
(A) 0.4 mole
(B) 0.5 mole
(C) 0.6 mole
(D) 0.7 mole
(E) 0.8 mole