b. the interest of European nations in creating colonies in North and South America
Explanation:
- Monroe's doctrine was America's policy of opposing European colonialism in America beginning in 1823.
- In 1823, US President James Monroe rebelled against the intervention of European countries on the American continent.
- The doctrine said that further efforts by European states to seize control of any independent state in North or South America would be seen as "a manifestation of a hostile attitude toward the United States."
- At that moment, directed against the interventionist intentions of the Holy Alliance of European Powers towards the former Spanish and Portuguese colonies in South America, that policy later became "America to Americans" and gained a strong national character.
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I do not know the answer but I think it might be D. or A.
D.The confederate soldiers were given food and were allowed to keep their horses.
Using irrigation system was the practice closely associated with most ancient river valley civilization.