Answer:
With a historical example
Explanation:
Machiavelli was an Italian Renaissance diplomat, philosopher, and writer. He is often referred to as the father of modern political philosophy and political science.
In the given passage, he states that rulers must sometimes be cruel. The evidence he uses to support his claim is a historical example. He gives us an example of a historical figure, a real ruler - Cesare Borgia. He was cruel, but his cruelty brought peace to his country. In his case, it was better to be cruel than to be merciful and that way harm his people. This is how Machiavelli supports his opinion.
