The answer is d because he withdrew the federal troops
<span>After refusing to repay their debt following the Mexican-American War, European powers decided to implement a navy blockade onto the country, which would ultimately restrict an array of goods and products from coming into the country, further crippling their economy.</span>
The opium wars ended with China losing money and a colony.
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The map that is given gives you a hint to what the answer is. On the legend it states the hint, "people per km²". This tells us that the map shows the population density in South America. A population density map shows which areas have the most people to least people.
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The name of the ship that brought the settlers to Plymouth was the "Mayflower" and the document that most of its passengers signed was the "Mayflower Compact", which was enacted upon arrival.