How did social structure lead to discontent in latin america?

In the late 1700s in Latin America the social structure strictly divided most countries. Natives were tired of being enslaved or hobbled by the mestizos and spanish. The mestizos wanted a chance to participate fully and revolution was brewing. When the space between poor and rich is too wide it always brews discontent. 

Ithink the answer is b, monopoly

The correct answer is b