单项选择题

A.O3, then Zn, HOAc, then AlCl3, then CH3CO2H
B.H2SO4, HgSO4, H2O, heat
C.HCl, then CH3CO2H
D.O3, then Zn, HOAc, then H2SO4, HgSO4, H2O, heat
E.CH3CO2H, then H2O2, OH-/H2O
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