What major river flows some 2,350 miles (3,782 km) from its source in Minnesota to the Gulf of Mexico, making it an important route for trade?

the correct answer of the given question above would be the first option. it is important to know a currency's exchange rate when you are planning for the expenses for an overseas trip. when you are overseas, the money you will be using should be exchanged for the currency depending on where you travel and currency changes from time to time and differs from country to country so it is necessary to know the rate beforehand. hope this answer .

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your answer is

to dominate europe

and i know for a fact it can't be the others