Because Workers in a Feudal System Did Not Have the Right

Because workers in a feudal system did not have the right to leave the land (and, even if they could have, they were surrounded by other feudal lands owned by other feudal lords) , they

A) had little incentive to work hard, innovate, or try to change their circumstances, which meant that society as a whole did not progress much during this time
B) had ample time to experiment with new agricultural techniques, which dramatically increased the crop yield of their masters' lands
C) were able to devote themselves to self-education, so literacy spread quickly
D) were able to take time to observe and explore their natural world, leading the many important scientific discoveries about local ecosystems