Which of the following completed the final outline of the United States? * Help PLS Mexican Cession
Oregon Treaty
Gadsden Purchase
Louisiana Territory
What caused Spain to give Florida to the United States? *

Jefferson was able to convince the Spaniards to sell it to s.
After several attacks and raids from the Seminole Indians, Florida became too much handle
Andrew Jackson paid Spain 15 millions for it.
After the Spanish-American War the United States acquired Florida

Explanation:

The Gadsden purchase completed the final outline of the United States in 1854 when the U.S. purchased land from Mexico that became part of the modern states of Arizona and New Mexico.

Spain reacquired Florida from the British after the American Revolution but found that holding it was a cumbersome and financially draining endeavour with constant border disputes with the U.S. and with several attacks and raids from Native Indians. They therefore 'sold' Florida to the Americans.

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

the answer i chose to believe is 'harmony'