Which Secretary of State, who later played a key role in forming the Adams-Onis Treaty and is connected to the Monroe Doctrine, earned the nickname from his era?

• A. Henry Clay
• B. Daniel Webster
• C. John Quincy Adams
• D. John Adams

Answer: (C)

John Quincy Adams, as Secretary of State under James Monroe, became the leading figure shaping early 19th-century American diplomacy. He was the driving force behind the Monroe Doctrine, a 선언 that warned European powers to refrain from colonizing or interfering in newly independent nations of the Americas and asserted a distinct American sphere of influence in the Western Hemisphere. He also negotiated the Adams-Onis Treaty with Spain in 1819, which secured Florida for the United States and set a clear boundary between U.S. and Spanish territories. His era is remembered for a profile of skilled diplomacy and eloquence, earning him a nickname that reflected that reputation. These roles—Monroe Doctrine and Adams-Onis Treaty—identify him as the Secretary of State in question.