Subqueries are useful when you need to simplify complex criteria

The Federal Information Security Management Act is an element of which of the following choices?    

A. Standard for Security Categorization of Federal Information and Information Systems B. Minimum Security Requirements for Federal Information and Information Systems C. E-Government Act D. Recommended Security Controls for Federal Information Systems Implementation

Which of the following is not allowed?

a. Objects of abstract classes. b. Multiple pure virtual functions in a single abstract class. c. References to abstract classes. d. Arrays of pointers to abstract classes.