What happened to the conquered people of the aztec warriors?

Many, but not all, were sacrificed in a ritual human sacrifice in their Templo Mayor (modern name) - in fact, these people for sacrifice were one of the reasons they conquered.

Generally though, they were allowed to live their life and sometimes even keep their language and administration - as long as they paid tributes to the Aztecs. 

What are the options?

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.