A bar graph of preferred study locations among 100 students shows bars with heights: Library 40, Cafeteria 15, Dorm 25, Coffee Shop 20. Which category is the mode and why?

Cafeteria, because it offers an informal atmosphere that likely influences many students even if its bar is not the tallest.

Coffee Shop, since the presence of nearby coffee shops affects study habits.

Dorm and Library together because both environments are commonly used.

Library, because its bar is tallest at 40 students, indicating the highest frequency.