Part A Which of the bonds shown in red are expected to have IR-active stretching frequencies? Check all that apply. H CH3 H H HzC CH3 H H H3C-CH3 o H-C=C-H 0 H-C=C-H H3C-C=C-CH3 H H3C-C-H H H,C CH3 C=C H H H3C-C=C-CH3 H-C=C-CH3 Submit Previous Answers Request Answer Incorrect: Try Again: 2 attempts remaining