What are two reasons this could happen?

An application developer has changed the Java XOM. The developer than tries to update the BOM but no differences appear.

What are two reasons this could happen? (Select two.)
A . A member in the Java XOM was deleted.
B . A member in the Java XOM was annotated as @Deprecated.
C . Only the content of method(s) in the Java XOM were changed.
D . A @NotBusiness annotation was added to a member of the Java XO
F . A additional optional parameter was added to a method(s) in the Java XO

Answer: AC