Why Were the Crop Failures of the Early Fourteenth Century

Why were the crop failures of the early fourteenth century particularly devastating to Europeans?

A) The population of Europe had tripled between the eleventh and fourteenth centuries.
B) Europe had invested heavily in the campaigns of the crusades.
C) The population of Europe had doubled between the eleventh and fourteenth centuries.
D) Over the centuries,inheritance laws had divided land into parcels too small to support the average family.
E) Land was unproductive because people of the Middle Ages had no concept of crop rotation.