The major product of the following reaction is:

• A
  $A$ polymer with a phenol group attached to the backbone.
• B
  $A$ polymer with a chlorine atom on the benzene ring and a methyl group on the backbone.
• C
  $A$ polymer with a chlorine atom on the benzene ring and no methyl group on the backbone.
• D
  $A$ polymer with a chlorine atom on the benzene ring and a methyl group on the backbone (different structure).