下列含碳化合物中，属于有机物的是[ ]

A.C₂H₅OH    

B.CO    

C.CO₂      

D. CaCO₃

____Lily ___Lucy can go with you , because one of them has to stay here to look after their mother

A．Either ; or

B．Neither ; nor

C．Both ; and

D．Not only ; but also