Draw the most important resonance structure of the cationic intermediate leading to the major product of electrophilic bromination of the compound below:[CH₃CH=CH₂]
a) [CH₃CH=CH₂]⁺
b) [CH₃CH²-CH₂]⁺
c) [CH₃CH=CHCH₃]⁺
d) [CH₃CH₂-CH=CH₂]⁺