The spanish created a race-based class system, which categorized people from mixed heritages. the term “mestizo” referred to people who were of spanish and descent, while “mulatto” referred to people who were of european and descent.

C. Amerindian . . . African

"Mestizo" meaning either Spaniard or American Indian
"Mulatto" referring to any offspring with one white and one black parent.

I used these definitions to make my assumption and to get to that answer, if these definitions help you get to a different answer, I'm glad to help. :)

He gathered information from primary sources.