The major products $A$ and $B$ from the following reactions are:

• A
  $A = \text{2,4,6-tribromoacetanilide}, B = \text{N-ethylaniline}$
• B
  $A = \text{4-bromoacetanilide}, B = \text{N-ethylaniline}$
• C
  $A = \text{2,4,6-tribromoacetanilide}, B = \text{aniline}$
• D
  $A = \text{4-bromoacetanilide}, B = \text{aniline}$