Question

in the 19th century, what trait or characteristic did scientists use to categorize people into races?

a. wealth
b. genetic patterns
c. skin color
d. all of the above

Explanation:

In the 19th century, scientists used skin color to categorize people into races. Genetic patterns were not well - understood in the 19th century (the field of genetics was in its infancy). Wealth is a social - economic factor and not a biological trait used for racial categorization in a scientific (at that time, mis - guided scientific) sense.

Answer:

C. Skin color