Read the following context and choose the best option to answer the question.
Context: Our journey took us to a region called the Dragon 's Spine , located in a high and rugged mountain range . Long ago , the dominant Han Chinese drove several minority ethnic groups out of the surrounding low lands . These groups then built their communities in the mountains , transforming the steep hillsides into terraces so that they could grow rice and other crops .
Question: What did they do on their tour ?
Options: 
- Learned how rice and crops are grown
 - Walked up the hills in the mountains
 - None of the above choices .
 - Learned the history of the Areas they saw


Learned the history of the Areas they saw