Us influence began expanding in the 19th century, following Monroe Doctrine which defended Latin America countries from European influence in the same manner that is helped US shed off Britain. They later even engaged in help with troops and benefits, both in 19th, and 20th century, even now in the 21st.
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I think the correct answer from the choices listed above is option D. The old world <span> product that became widely popular in Eurasia only once it was cultivated in the new world would be potatoes. Hope this answers the question. Have a nice day.</span>
Answer:
because it changed the whole way people approached things
Merchants and traders who travel along these routes must stop at oases to replenish food and water supplies and this means that whoever controls an oasis also controls the trade along the route—making oases desirable to political, economic, and military leaders.