3 stack plot uses stacked horizontal bars to show the breakdown of average student budgets at different types of institutions. Use the data in the graph to complete parts (a) through (c) below. Click the icon to view the graph. a. Which cost category varies the least among the different types of colleges? Can you explain why this category varies so little? A. Room and board varies the least because it costs all types of colleges the same amount of money to have a student live on campus. B. Tuition and foes varies the least because the operational costs for all types of colleges are the same C. Other expenses vary the least because all college students the have same general expenses at all types of colloges. D. Transportation varies the least because students at all types of colleges have the same mode of transportation. E. Books and supplies varies the least because students at all types of colleges need approximately the same number of books and supplies and these don't vary much in cost