Read the following context and choose the best option to answer the question.
Context: 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 " .
Question: Why did they want to go tubing ?
Options: 
A. Because they wanted to rent something .
B. Because they like rubber .
C. None of the above choices .
D. Because they thought it would be a fun thing to do .


D