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A new writing system was created for representing numbers. New advancements were made in algebra and medical science. A new multiplication system was invented, and scientists made maps of the stars.
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The answer is C mexico city hope this helps and does not get deleted again
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Navigable rivers and geographical conditions.
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Rivers and moderate distances between the countries have been an advantage for Europe because it makes it easy to transport goods all across the realm. Rivers and canals provided transportation routes for goods and people. Rivers use to transport goods between coastal harbors and the inland, aiding economic growth, and they bring people and goods together.
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. Galileo Galilei was the first astronomer to use a telescope to study the heavens. Galileo made a number of observations that finally helped convince people that the Sun-centered solar system model (the heliocentric model), as proposed by Copernicus, was correct.
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It fosters friendly relations between its members, it solves international problems and promotes human rights, and it harmonizes its members' actions.
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