某酯分子式为C₆H₁₂O₂，该酯水解生成A和B，B是A的同分异构体的氧化产物，该酯为                                          

A．CH3CH(CH3)COOC2H5	B．CH3CH2COO(CH2)2CH3
C．CH3COO(CH2)3CH3	D．CH3CH2COOCH(CH3)2