if a motorcycle class is created as a subclass of a vehicle class, which of the following statements is correct? group of answer choices the motorcycle class can directly use neither the private instance variables nor the public methods of the vehicle class. the motorcycle class can directly use the public methods, but not the private instance variables, of the vehicle class. the motorcycle class can directly use the private instance variables, but not the public methods, of the vehicle class. the motorcycle class can directly use both the private instance variables and the public methods of the vehicle class.