What is the purpose for the code of chivalry?

a. to protect nobles from the king.
b. to ensure peasants have land to work.
c. to collect taxes from knights.
d. to give knights standards of behavior.

To give knights standards of behavior.

Explanation:

The code of chivalry was intended to prevent lawlessness on the part of knights by appealing to their sense of honor.

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c) they were beaten and fired from their jobs.