Why Is the Following Not a Good Two Step Route

Why is the following not a good two step route for the preparation of pure L-alanine?

A) The bromination is not selective (the CH₃ and CH₂ groups are both brominated) .
B) Ammonia is not sufficiently nucleophillic to react with a secondary bromide.
C) Only the CH₃ group is brominated.
D) The product will be racemic.
E) Propanamide would be the major product.