Frank is entering college and is trying to decide between a business major and a liberal arts major. he decides to conduct a random survey to see the starting salary. the top box plot shows the starting salaries for a group of business majors and the bottom boxplot shows the starting salaries for a group of liberal arts majors.

which statement best compares the distributions?

a) on average the business majors had a starting salary that was greater by about $6.
b) on average the business majors had a starting salary that was greater by about $6000.
c) on average the liberal arts majors had a starting salary that was greater by about $6000.
d) on average there was a lot more variability in the business majors starting salaries than in the liberal arts majors.