<span>The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or theFlorida Treaty, was a treaty between the United States and Spainin 1819 that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain.</span>
I think that the answer is B
There are several ways in which a reader can determine the theme of a piece of literature, but the best way is to pay close attention to the very opening lines, where the theme is usually set up.
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No, it is false that the United Nations Environment Program regulates the environmental policy for all countries, since each sovereign country is in charge of its on regulatory policies.