Read the following context and choose the best option to answer the question.
Context: Yesterday I did n't walk or otherwise exercise . Today , I was hoping to make up for it by walking 6 km . I think I did about that distance , but it 's hard to tell from Google maps .
Question: Why is the person attempting to make up for not exercising on the day prior ?
Options: 
- None of the above choices .
 - They are required to walk to work as they can not afford to take a taxi and they missed the day before
 - They are fulfilling a requirement for an online gym class and must exercise a given number of hours
 - They are committed to improving their physical fitness and are trying to set a quota for themselves


They are committed to improving their physical fitness and are trying to set a quota for themselves