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In 1817, newly elected president James Monroe selected Adams as his Secretary of State. In that role, Adams negotiated the Adams–Onís Treaty, which provided for the American acquisition of Florida. He also helped formulate the Monroe Doctrine, which became a key tenet of U.S. foreign policy
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The best and most correct answer among the choices provided by your question is the first choice or letter A. The swamp forests formed into tropical rain forests.
The Carboniferous Period<span> is famous for its vast swamp forests, such as the one depicted here. Such swamps produced the coal from which the term </span>Carboniferous<span>, or "carbon-bearing," is derived. The </span>Carboniferous Period<span> lasted from about 359.2 to 299 million years ago* during the late Paleozoic </span>Era<span>.</span>
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The Visigoths (/ˈvɪzɪɡɒθs/; Latin: Visigothi, Wisigothi, Vesi, Visi, Wesi, Wisi) were an early Germanic people who along with the Ostrogoths constituted the two major political entities of the Goths within the Roman Empire in Late Antiquity, or what is known as the Migration Period. The Visigoths emerged from earlier Gothic groups, including a large group of Thervingi, who had moved into the Roman Empire beginning in 376 and had played a major role in defeating the Romans at the Battle of Adrianople in 378.[1] Relations between the Romans and the Visigoths were variable, alternately warring with one another and making treaties when convenient.[2] Under their first leader, Alaric I, they invaded Italy and sacked Rome in August 410. Afterwards, they began settling down, first in southern Gaul and eventually in Hispania, where they founded the Visigothic Kingdom and maintained a presence from the 5th to the 8th centuries AD.
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