What are the varied stereotypes and personas that have been used and imposed in popular culture to mislabel African American peoples?

Me with this psychology homework, i’m struggling with it.

As societies modernize, what often happens to crime rates? a. they increase b. they decrease c. they remain the same d. they increase slightly and then fall rapidly

Carbon tetrachloride is a toxic liquid. a carbon tetrachloride molecule has one atom of carbon and four atoms of chlorine. what is its chemical formula?