Also...I feel a bit uneasy about the ireland ine. Yes, great Britain is an island of 3 countries. But the ireland that contains ireland contains two separate countries. Ireland and northern ireland. Theyre not the same country. Maybe its ok but it doesn't quite fit in with the rest of the clues I feel.
As to why so few people get PEI... it's by far the least famous island of all of these. Having far and away the lowest population aside from Greenland, and Greenland is the largest island in the world so it's well known for other reasons. Are Charlottetown is by an even wider margin the least famous city of all of these cities. Even if you had heard of PEI there's a good chance you wouldn't know the names of any cities on it. I'm actually surprised that 23% got it - seems pretty high. Completely obscure answer next to every other one on the quiz.
So St Domingo is for Dominican Republic?
Sorry for my english.