For each of the following situations, choose one of these as the appropriate display: single pie chart, histogram, side-by-side boxplots, or scatterplot.
a. Distance run in 6 minutes by middle school and by high school students
b. Gross motor quotient (MQ) scores for a large group of students
c. Children's MQ scores and the distance they can run in 6 minutes
d. Fitness levels of students, classified as being exceptionally poor, unexceptional, or exceptionally good