This quiz is a bizarre mixture of "what's the weirdest well-known food in this country" and "what's a safe bet that this country eats a lot of"? In any event, the title is wildly inaccurate. Escargot is not the most common food eaten in Andorra. Cuy - guinea pig is not the most common food eaten in Ecuador. Waffles not the most common food in Belgium. ad infinitum
Even for the the non extremely specific exotic dishes, I'm absolutely sure that fries are not the most common food us Canadians eat. That would be absurd.