The two Rivers that meet at the mouth of Rio de la Plata forming its estuary are Rio Parana and Uruguay. Parana river runs through Central South America,Brazil, Paraguay, and Argentina some 4,880 kilometres .Uruguay river runs north to south and separates boundaries of Brazil, Argentina, and Uruguay.
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The final of the 10 amendments that constitute the Bill of Rights, the Tenth Amendment was inserted into the Constitution largely to relieve tension and to assuage the fears of states' rights advocates, who believed that the newly adopted Constitution would enable the federal government to run roughshod over the states
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