Which of these statements regarding feudalism is most accurate? a. feudalism to sustain the growing industrial productivity of europe. b. feudalism fueled the european ability to explore the new world and africa. c. feudalism was a complex system of relationships between people of different classes. d. feudalism was built upon a system of buying and selling serfs obtained from other lands. elimi?

Feudalism was a complex system of relationships between people of different classes.

The king stood at the top of the complex system, and nobles were viewed as holding their lands in exchange  for their military service to the king.  The nobles then had vassals underneath them.  And at the bottom of the system, depending on the upper classes for protection and laws, were the peasants, who gave a share of their produce to the lords above them as their part of the exchange.