Today I can run a mile in about 6 minutes , which in the grand scheme of athletic things is n't all that fast , but compared to the sloth - like pace back in 6th grade I ' ve come a long ways . And in my perpetually dissatisfied view of my athletic self I still yet have a ways to go . Let 's make this clear though - everybody has a limit .
According to the above context, choose the best option to answer the following question.
Question: What will most likely happen as the writer continues to run ?
Options:
- They will be tired more easily .
 - They will feel that running is not worth it .
 - Their speed will increase .
 - They will feel more hungry .


Their speed will increase .