Read the following context and choose the best option to answer the question.
Context: It 's a long way to be sustainable country in China . but these nice persons action will change China for sustainable country all over the world . I will walk through China and all over the world not only for China for our earth .
Question: What may be the reason for this person walking through China ?
Options: 
- None of the above choices .
 - They want to save money by walking on foot .
 - They like to walk rather than using a car .
 - They want to refrain from using cars .


They want to refrain from using cars .