we 're in vang vieng at the moment . it 's surrounded by lush mountains . we rented a couple o huge rubber rings today to do " tubing " .
According to the above context, choose the best option to answer the following question.
Question: Why did they want to go tubing ?
Options:
- Because they wanted to rent something .
 - Because they like rubber .
 - None of the above choices .
 - Because they thought it would be a fun thing to do .


Because they thought it would be a fun thing to do .