Which events changed europe and asia during the late middle ages? . choose all answers that are correct.. a.. chinese emperors made opening the doors to greater trade and contact with foreigners their highest priority.. b.. famine and plague devastated europe's population.. c.. mongol rule weakened across their vast empire.. d.. england and france fought a series of related conflicts which became known as the hundred years’ war.. e.. wars between christians and muslims resulted in the expansion of christianity and european empires.