An expressway might leave the Us to go to canada.is the reasoning for what question and answer pair?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Q: Where might an expressway leave the Us to go?
Options:
- large city
- canada
- country
- map
- highways
A: canada