As Secretary of State, John Quincy Adams O negotiated a treaty with Great Britain for Oregon Country.
O made Manifest Destiny an official United States policy.
O convinced Great Britain that it could not control Florida.
O negotiated a treaty with Spain for control of Florida.

Correct answer is negotiated a treaty with Spain for control of Florida.

Explanation:

First option is not correct as the document Oregon Treaty was negotiated in 1846 by  by Secretary of State James Buchanan.

Second option is not correct as Manifest destiny as a term emerged in 1845, long after Adams was secretary of State.

Third option is not historically accurate.

Last option is correct as this refers to Adams-Onís Treaty from 1819 that was signed when Adams was Secretary of State.

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