Under the code of chivalry is a knight sworn to serve his feudal lord

There was one single Code of Chivalry - it was a moral system which went beyond rules of combat and introduced the concept of “Chivalrous conduct” or the qualities idealized by knighthood, such as bravery, courtesy, honor, and gallantry toward women.

Explanation:

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live

d) eastern business owners and former federalists