Polymorphism is the idea that describes how objects that inherit from a common class can implement the same method differently. True False Which of the following is true of Abstract Classes? Abstract classes are not instantiated. Abstract classes must inherit from another user-created class. Abstract classes must have complete method statements, not just method signatures. Abstract classes cannot inherit from other classes. Aggregation is the design pattern where classes are built from other classes. True False Inheritance represents a "one to many" relationship between classes. True False