16.下列Br2與CH3CH=CHCH3反應何者正確?(A)CH3CH=CHCH3+Br2→CH3CHBrCH2CH3+HBr(B)CH3CH=CHCH3+Br2→BrCH2CHCHBrCH3(C)CH3CH=CHCH3+Br2→BrCH2CH2CH2CH2Br(D)CH3CH=CHCH3+Br2→CH3CHBrCHBrCH3