28) The process of having a class contain an instance of another class is known as A) dynamic composition B) object overloading C) operator overloading D) object composition E) None of the above. 29) A A) dynamic B) recursive C) static D) data validation E) overloaded function is one that calls itself. 30) The Quicksort algorithm works on the basis of A) two pivots and a sublist B) three pivots C) three sublists D) two sublists and a pivot E) None of the above