True or false feudalism concerned the lower classes

The answer to this question is true! (Had to say that for the 20 characters max)

My answer -

TRUE! Feudalism is a series of complicated lord-and-vassal relationships between nobles, but the living conditions of serfs under the feudal system are hugely important to Western history. The overall squalor of the lives of the serfs (lower classes) contributed to the rapid spread of diseases like the black plague, the eventual re-emergence of major population centers, and the prevalence and importance of the Catholic church.

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