Read the following context and choose the best option to answer the question.
Context: I ' m so tired . Law school is exhausting . I feel guilty because I drove to campus today for the first time ( I ' ve been on the bus ) and paid the $ 7 to park in the garage .
Question: Why do they feel exhausted from school ?
Options: 
A. They spend too much time out with their friends .
B. They are constantly studying and doing homework .
C. They refuse to go to bed early on school nights .
D. They work a lot at their job outside of school .


B