Which statements about the @Override annotation are correct? (Choose three.)

A. It can be optionally specified when a class implements an abstract interface method.

B. Adding it to a method may trigger a compiler error.

C. It is required whenever a class implements an abstract interface method.

D. It can be added to an interface declaration type.

E. It can be optionally specified when a method is overridden in a subclass.

F. It is required whenever a method is overridden in a subclass.