Considering the Event Processing Classes, What Is the Advantage of Extending

Multiple Choice

Considering the event processing classes, what is the advantage of extending an adaptor class compared to implementing an interface?

A) Adaptors save the programmer from having to create a collection of empty-bodied methods
B) Adaptors save the programmer from having to create inner classes
C) Adaptors can be used even when interfaces cannot
D) Adaptors are more efficient at run time
E) none of the above