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 .
According to the above context, choose the best option to answer the following question.
Question: Why do they feel exhausted from school ?
Options:
- They spend too much time out with their friends .
 - They are constantly studying and doing homework .
 - They refuse to go to bed early on school nights .
 - They work a lot at their job outside of school .


They are constantly studying and doing homework .