which of the following types of information is not suited for display on a double bar graph?

A. populations of boys and girls at three different schools
B. number of records versus compact discs sold each week during a one month period at music den
C. the weekly interest rate for mortgages at a bank for the past year
D. numbers of hot and cold lunches sold each day in the school cafeteria during the first week of school

Please Help Me!