Which Scenario Is Not a Likely Occurrence After a Gene

Which scenario is not a likely occurrence after a gene duplication event?

A) One gene retains its function, while the other becomes a pseudogene.
B) Both genes retain their functions, but they are expressed in different patterns or tissues.
C) Both genes become pseudogenes.
D) One gene retains its function, while the other evolves to have a new function.
E) Both genes are deleted from the genome.