The Courtier by Castiglione was a
a. primer on military training for nobles.
b. a very popular handbook laying out the new skills in politics, the arts, and personal comportment expected of Renaissance aristocrats.
c. sharp denunciation of the wasteful noble life.
d. treatise against active participation in public life.
e. work on how to achieve political power and then keep it.

Option B

Explanation:

The Courtier by Castiglione was a very popular handbook laying out the new skills in politics, the arts, and personal comportment expected of Renaissance aristocrats. The Courtier by Castiglione is a book written by Count Baldassare Castiglione  which provides a fascinating insight into Renaissance court life.

i would say that the politicial parties from state to state varies.