ORC - How to Create Country Specific Prescreen Questions?

Summary:

Best way to categorize country specific prescreen questions in ORC?

Content (required):

I am trying to have prescreen questions populate only for Canada and another set of questions for only United States. I do have the option to set the question Context by Location, but it's requiring City, State and Country instead of just by Country. Canada wouldn't be an issue since we only have a small number of Canadian cities loaded into our Geography Hierarchies, but we have every single United States city loaded. Although technically feasible, it would be unbearable amount of time and effort to contextualize every US city for each US prescreen question.