Answer:
Options B, C and D.
Explanation:
Considering the late middle ages to be the 14th and 15th centuries, the choices are as follows:
B - Famine and plague devastated Europe's population. The time was termed as black death period that killed nearly 25 million people in Europe.
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. This war lasted for 116 years.