----It’s too hot. Would you mind ________ the door?

----________. Please do it now.

A．to open; OK

B．opening; Certainly not

C．opening; Of course

D．to open; Good idea

某有机物甲经氧化后得乙（分子式为C₂H₃O₂Cl）；而甲经水解可得丙，1mol丙和2mol乙反应的一种含氯的酯（C₆H₈O₄Cl₂）．由此推断甲的结构简式为（　　）

A．HO-CH₂-CH₂-OH

B．OHC-O-CH₂Cl

C．ClCH₂CHO

D．ClCH₂CH₂OH