Which of These Is the Rate-Determining Step in the Bromination

Multiple Choice

Which of these is the rate-determining step in the bromination of benzene?

A) Complexation of bromine with the iron(III) bromide catalyst
B) Formation of Br⁺ ion
C) Addition of Br⁺ to benzene to form the arenium ion
D) Loss of a proton from the arenium ion to form bromobenzene
E) None of these choices.