Which events changed europe and asia during the late middle ages

choose all answers that are correct

a . famine and plague devastated europe's population

b . chinese emperors made opening the greater trade and contact with foreigners their highest priority

c. wars between christians and muslims resulted in the expansion of christianity and european empires

d . england and france fought a series of related conflict which became known as the hundred years' war

e . mongol rule weakened across their vast empire