Answer:
A. A farmer that gives his produce to someone else
Step-by-step explanation:
A "serf" from the Latin word "servus" is the name given to an individual that is obligated to do agricultural work on a farm or plot of land. This type of activity was particularly common during the Dark Ages or Medieval times. During this time the Europeans were engaged in the practice of feudalism which gave all the land to the King who shared with his chosen Nobel/military men etc. These gifts were called fiefs. Serfs working on these lands were made to give up most of and in some cases all of what they worked for under the premise of the land not being owned by them. It was no doubt a very unbalanced system and fortunately did not last long.