The number of hours worked by the employees of Bob's Car Wash in one week are listed.
20, 40, 30, 36, 36, 40, 39, 36, 38
The mean is 35 hours per week and the median is 36 hours per week.
Which statement best explains why the mean is less than the median?
A. There are only 9 employees.
B. Nobody works more than 40 hours.
C. The smallest number is half the largest.
D. One worker works much fewer hours than everyone else.