When designing a class hierarchy, which of the following should be true of a superclass? A) A superclass should contain the most specific details of the class hierarchy. B) A superclass should have public data in order to provide access for the entire class hierarchy. C) A superclass should be the largest, most complex class from which all other subclasses are derived. D) A superclass should contain the data and functionality that are only required for the most complex class. E) A superclass should contain the data and functionality that are common to all subclasses that inherit from the superclass. Save Question 21 (1 point) Assume that x and y are boolean variables and have been properly initialized