Which sentence best support the idea that Pizarro was ruthless?

There are a lot of examples, is there a list of answers to chose from?

Explanation:

When one of his trusted men rebelled, Pizarro ordered that Manco's wife, Cura Ocllo, be tied to a stake and shot with arrows: her body was floated down a river where Manco would find it. Pizarro ordered the murder of 16 captured Inca chieftains. One of them was burned alive. He betrayed one of his partners leading to an eventual civil war when the partner captured the city.