The correct answer is A. Olmec
They were the group of people that lived in the central and south America before all the more famous groups like Aztecs, Maya and Inca. They created the calendar that was used by those three later and many believe that they are the creators of the concept of zero.
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I believe it's Hinduism and Islam
Black-footed albatross, the bowerbird, red-capped manakin, Western and Clark''s grèbe, Victoria's riflebird, peacock, sand hill crane, greater sage grouse, Andean flamingo. Hope this helps!!!
People in the south used slaves because their economy was focussed on things like cash crops (tobacco, cotton, etc.) These crops required a lot of work so farmers and plantation owners could not do it by themselves. So by using enslave persons they could harvest more crops, sell more, make more money, and in return boost the southern economy.
D) To fight the spread of communism.
Because of the Domino Theory they thought that if Vietnam fell into Communism, the whole region would follow. So therefore they wanted to support South Vietnam in order to contain Communism in Asia.
