C 30. Which of the following reactions shows the correct major product? CH3 CH3 Cl X = 4 x = # H CH3 a H- H CH3 -CH3 HCI CH3 CH3 CH3 b HBr HBr -CH3 ✓ Br -CH3 CH3 31. Which one of the following alkenes is the most stable? Br -CH3 H CH2CH2CH3 H3C H H3C CH2CH3 CH3 H H CH2CH3 H H H3C CH3 b d a