This task involves asking a question, providing a set of 2 options. You are expected to choose the best answer to the question. The output will be in the form of A or B, corresponding to which option is chosen.

Let me give you an example: Question:Who was the man behind The Chipmunks? ,  Options: [A. David Seville, B. Alvin Seville] 
The answer to this example can be: A
Here is why: David Seville was the man behind the Chipmunks. So, the correct answer is A.

OK. solve this:
Question:Which event held in Alberta, Canada, which bills itself as The Greatest Outdoor Show on Earth, is a large festival, exhibition, and rodeo held for 10 days every summer in July, attracts more than 1.2 million visitors? ,  Options: [A.Calgary Stampede B.Christmas]
Answer:
A