The idea of race has been used to justify or explain the following in the United States (select all that apply): The idea that certain human beings could legally and morally buy, sell, trade, murder and otherwise dehumanize other human beings

That certain “races” are destined to thrive while other are destined for extinction

That social inequalities like poverty and disease are actually rooted in biology and thus inevitable

i think the answer is   b.

the iconic cartoon that you are talking about is probably a man standing on top of a country with his legs spread wide. 

this cartoon suggests that europeans are powerful enough to subdue an entire continent. this was a satirical image that was drawn during the time of the colonization of the british empire in africa.

this image was inspired by the plans of the british empire to create telegraph lines all over africa promoting the further spread of its colonies through faster communication. the picture depicts the colonial mentality of the british empire in general as well as the struggle of africans to claim their own land. hope this ! (: