Based on his observations in Source 2, what did de Las Casas believe the Spanish leadership’s main reason for exploring and conquering the New World?

The correct answer is B: To gain riches and resources.

De Las Casas observed that the Spanish leadership was primarily motivated by the desire for wealth, including gold and other valuable resources, which they sought in the New World. This drive for riches often overshadowed other potential motivations, like spreading Christianity or supporting European rivals. If you need more details on this topic, feel free to check the extended services page for deeper assistance!