I don't get it - then why give this option in the form. Its an electronic form...and it was just a question of preference. I didnt even want to indicate anywhere because I am not sure. I am so surprised they didn't even ask me - it took me 5 months to complete this application, get the ITA, complete the documents, and apply.
I only indicated Montreal because I speak a little French and my current org has an affiliated office there - but I don't even care necessarily to continue working for them! I've always found Toronto to be more fascinating than Montreal...
But they didn't even ask!