Because it is the widest collection of information on the internet. I can get information quickly and relatively accurate, as it is mainly a collection of multiple factual resources and is considered an accurate source by Quizmaster. Trust me, if you've made multiple quizzes, it is an amazing resource- ask any quiz maker.
There was a slight technical error in the creation of the quiz which prevented automatic type-in answers from being accepted for the Federated States of Micronesia which caused 'fsm' to not be accepted. I have fixed the issue and all normal type-ins should now be accepted.
WRI #10 Finland : 31,119 km