1. A key benefit of inheritance is

A. only some of the parent's methods are applicable in the child class

B. it allows the invocation of this()

C. private, public and protected visibility modifiers can be used on all members

D. an object can have several types, it is type compatible with any of its superclasses

2. What is the largest unsigned (positive) 4-bit binary number? What is the largest unsigned N-Bit binary number?