Which of the following BEST explains the use of cause-effect graphing?

[answerhappygod]

Which of the following BEST explains the use of cause-effect graphing?

A. Useful to gain a graphical overview of a program's logical structure and are typically used as the basis for creating decision tables.
B. Used with the purpose that with a limited set of test cases a reasonable level of coverage can be achieved.
C. Used to test the ability of the software to enter into and exit from defined states via valid and invalid transitions.
D. Used as a clear method to verify testing of all pertinent combinations of conditions and to verify that all possible combinations are handled by the software