Which BEST describes how the bubonic plague affected the feudal system in medieval Europe?

Responses
A The plague caused most of the artisans to leave Europe, so the peasants did not have the proper tools for farming.The plague caused most of the artisans to leave Europe, so the peasants did not have the proper tools for farming.
B The plague shut down all trade routes throughout Europe, so the nobility relied on farmers and artisans for all their goods.The plague shut down all trade routes throughout Europe, so the nobility relied on farmers and artisans for all their goods.
C The plague killed many peasants who worked the land, so the ruling classes did not have as many farmers to work their lands.The plague killed many peasants who worked the land, so the ruling classes did not have as many farmers to work their lands.
D The plague caused all the members of the ruling class to move to the cities, so the peasant class took over the lands they left behind.

C The plague killed many peasants who worked the land, so the ruling classes did not have as many farmers to work their lands.