38) An abstract class is A) one that has all its member variables declared private B) one that has at least one pure virtual function C) one that has all its member functions declared protected D) one that has all its member functions declared private 39) A pure virtual function A) is a virtual function that has been completely debugged B) is a virtual function with no implementation C) is one called from within a virtual constructor D) is a virtual function that can only return a single variable E) None of the above 40) In the statement template what does T represent? A) The "int" date type B) A generic data type that is used in the function template C) T stands for "template." D) The name of the function template E) None of the above 41) If, in a linked list, the head pointer points to NULL, it is an indication that A) The list contains no nodes B) The list is full and can accept no new nodes C) The list needs to be destroyed D) an error has occurred E) None of the above