Which of the Following Statements About Interfaces Is False

Multiple Choice

Which of the following statements about interfaces is false?

A) An interface describes a set of methods that can be called on an object,providing a default implementation for the methods.
B) An interface describes a set of methods that can be called on an object,not providing concrete implementation for the methods.
C) Interfaces are useful when attempting to assign common functionality to possibly unrelated classes.
D) Once a class implements an interface,all objects of that class have an is-a relationship with the interface type.