Definition: In this task, you will be presented with a question that has multiple possible answers. You should choose the most suitable option out of "A", "B", "C", "D", and "E", based on your commonsense knowledge.
Input: Question: He knew of prairie dogs back home but wasn't sure if what he saw was a marmot, but the outback tour guide explained it was during his tour of where? 
 Options: A north america B wilderness C desert D australia E switzerland 

D