Which was the lowest of the four social classes in new spain?

Indios (or Native Americans in some countries colonized by the Spanish) were the lowest of the four classes in New Spain. They were usually treated as the slaves to the upperclassmen of the New Spanish society. The other classes were the Peninsulares (wealthy and influential people in the society), Creoles (wealthy and educated people), and the Mestizos (has mixed race, usually  of Spanish and Native American blood).

The correct answer is indians :)