MULTIPLE CHOICE: Circle the correct answer. 1. PolH ). A Java interface is an example of: a. encapsulationn b. abstraction c. polymorphism d. all of the above ii). A class that uses an interface must use the keyword a. Extends b. Inherits c Super d. Implements ii). An interface and all of its method headings are normally declared to be: a. public private c. protected d. Package access