Which factor contributed to the development of manorialism? A. Security for peasants and labor for the lord's lands
b.Peasants and their lords were tied together by the same religion.
c.Fees paid entitled serfs to the lord's protection from warfare.
D. Estates became self-sufficient under authority from monarchs.

A. Security for peasants and labor for the lord's lands

Explanation:

"Manorialism" is also known as Seigneurialism. This kind of system allowed the peasants and the lord to live together in harmony. It was common in the Middle Ages for landlord's to receive lands from noble people. The land also included the people residing in it, so this means that the lord becomes the new powerful authority for the people living on the land. In this case, the peasant were bound to give tributes to the lord of the land. In order to do this, they have to provide labor to the lord's lands. In return, the lord ensures their security by protecting them.