Which idea strengthen the acceptance of slavery a. communism- - the belief that history is the struggle between economic classes b. capitalism- - the belief that the market should determine who was rich and who was poor c. racism- the belief that some races are superior to others d. the enlightenment- - the belief that reason would solve mankind’s problems

C - Racism - the belief that some races are superior to others.

Slavery was caused by a need for labor and people to do it other than themselves as people who owned slaves deemed themselves as a savior in a sense.

Racism boosted the need and especially want for slavery. Racism gave the white man an excuse to say that they were superior to African American's, forcing them into a lower class of slaves and working for them.

A would be incorrect as that focused on the economy rather than social standings.

B would be incorrect as that focused on the market and income rather than, yet again, social standards.

D would be incorrect as the enlightenment was more of a golden like age than anything, where people came together to share ideas and opinions while expressing it in different forms.

Hope this helps!