Final answer:
B. Castiglione wrote The Book of the Courtier, describing courtly behavior in the Renaissance.
Step-by-step explanation:
The Renaissance figure who wrote The Book of the Courtier, which describes how nobles should behave at a royal court, was B. Castiglione. The book was published in 1528 and it became widely influential during the Renaissance period. It presented an idealized vision of courtly etiquette and behavior, emphasizing the qualities and skills necessary for a noble to succeed at court.
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