Well i found the choices that u left out and the answer should be letter choice d
(Beginning in the mid 1500's Spanish laws allowed Africans but not indigenous peoples to be enslaved though in practice both groups continued to be treated poorly by Spanish colonist)
It's '<span>inherited genes'.
</span>John locke, considered to be the founder of modern educational philosophy, conceived the theory of 'inherited genes'
The Spanish were at that time, as they had more advancements that were used against the Aztecs