Which of the Following Was a Major Change in the Administration

Which of the following was a major change in the administration of China under the Mongols?

A) The central bureaucracy was dismissed and the Mongol dynasty ruled with a military elite.
B) The Mongols discontinued the use of the examination system to keep the scholar-gentry from gaining too much power.
C) The Mongols divided all of China into four great khanates under separate and independent rulers.
D) Confucianism was suppressed and Daoism became the state religion of China.