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In which of the compounds below is there more than one kind of hybridization (sp, sp^2, sp^3) for carbon? I. CH3CH2CHCH3 II. CH3CH=CHCH3 III. CH2=CH-CH=CH2 IV. H-C≡C-H A. I. II, and III B. III and IV C. III only D. II and III E. II only