Identify a Limitation of the Friedel-Crafts Alkylation of Benzene

Multiple Choice

Identify a limitation of the Friedel-Crafts alkylation of benzene.

A) Acylium ion does not undergo rearrangement.
B) A benzene ring with electron-withdrawing groups can undergo alkylation under normal reaction conditions.
C) The alkylated products are less reactive than benzene.
D) Alkyl carbocation formed during a reaction can rearrange to a more stable carbocation.