As secretary of state, john quincy adams
a. negotiated a treaty with great britain for oregon country.
b. made manifest destiny an official united states policy.
c. convinced great britain that it could not control florida.
d. negotiated a treaty with spain for control of florida.

D is the correct answer.

Adams negotiated the Adams-Onis treaty, ratified in 1821, which gave the US control over Florida.

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

d is the correct answer