How Did Whites Address Racism in the 1830s and 1840s

How did whites address racism in the 1830s and 1840s?

A) Many whites began to denounce racism in this time period.
B) Scientists argued that white people white Americans were a superior race culturally, physically, and intellectually; they were, therefore, entitled to rule over other races.
C) Scientists argued that race was the product of environment and could be altered through education.
D) Scientists argued that nonwhites began the human race but did not benefit it technologically.