<span>Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies
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Restrict the flow of immigrants.
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<em>- Uaiska</em>
Based on the fact that Charleston Mercury was a southern sympathizer, the editor most likely chooses the name "War of Southern Independence" for the US Civil War.
Where answers B, C and D have inaccuracies in one or more parts, answer A is the only correct answer.
