An analyst has collected the following data on voters for a winning candidate in a mayoral race: 18-25 years old: 2,987

26-35 years old: 5,974

36-50 years old: 9,564

51-65 years old: 10,983

66-80 years old: 6,945

81-95 years old: 1,093

Which type of graph would be best to use to display the number in each age group as a portion of the total number of voters? (Multiple Choice)

A. a bar graph
B. a circle graph
C. a histogram
D. a line graph