What Was the Most Prominent Cause for the Famine in the Early

What was the most prominent cause for the famine in the early fourteenth century?

A) The Little Ice Age had a dramatic effect on climate and the length of the growing season.
B) The population explosion left little resources for the poor.
C) Plants brought in from trade with the East decimated the crop harvests in western Europe.
D) Massive flooding drowned the crops in the fields of France.
E) Piracy in the Mediterranean cut off food-supply ships.