The dot plots represent the number of students who enrolled each year for the ap psychology course at two schools. the data represents the last 24 years. which statement is true based on the mean number of students enrolled in the course?

a. the variability in the number of students enrolled each year in school 1 is equal to the variability in the number of students enrolled in school 2.
b. the variability in the number of students enrolled each year in school 1 is generally lower than the variability in the number of students enrolled in school 2.
c. the number of students enrolled each year in school 1 is generally higher than the number of students enrolled in school 2.
d. the number of students enrolled each year in school 1 is generally lower than the number of students enrolled in school 2.