Letter C sounds the best to me!
Answer:
The subjects of a conquered kingdom are not used to living in freedom or standing up for themselves, and are therefore slower to take up arms than are the citizens of a republic. There are three options for the conquering prince: destroy the republic, live there, or set up a puppet government. At the end of the day, Machiavelli seems to favor the first option.
The answer is C, although the other options are important as well, in this case, C is the answer you are looking for
