经催化加氢可得2-甲基丁焼的化合物是( )。CH3C=CH CH3 (7H-CsCH CH3-CH-C=CH2 CH3-(jU-CsCH CH3-H-〒=C CH
D: CH3 CHs
选项：

A: CH3-CH=CH-CH3
B:
B: R-CH=CH2 + Cl2— RCH=CHC1 + HC1
C: CH3CH=CH2 + Br2 — CH2BrCH=CH2 +HBr
D: CH2=CH2 + F2 — CH2FCH2F