(Use the Following Information to Answer the Next Two Questions

(Use the following information to answer the next two questions.)
A study was done in an attempt to discriminate between the listeners of three popular AM radio stations during the morning "drive-time" period. The following demographic variables were used in the analysis: age, income, education, marital status, number of children at home, and gender. Use the information to answer the following two questions?
-If a research analyst decided to analyze the information using the graphical approach, how many different two-way graphs are possible?

A) 12
B) 15
C) 120
D) 16
E) None of the above.