The correct option is D CH3COOH
Controlled oxidation is used for the given conversion which is process of heating the substance in a regulated supply of O2/air at high pressure and in the presence of a catalyst to produce various oxidation products.
2C2H6+3O2(CH3COO)2Mn−−−−−−−−−−→△2CH3COOH+2H2O
Hence, correct option is 'd'