卤代烃能够发生下列反应:2CH3CH2Br+2Na→CH3CHCH2CH3+3NaBr.下列有机物可合成环丙烷的是()
A.CH3CH2CH2ClB.CH3CHBrCH2Br
C.CH2BrCH2CH2BrD.CH3CHBrCH2CH2Br