Spain Sold Florida in 1819 to the United States Because

Spain sold Florida in 1819 to the United States because it

A) wanted to help America to become a rival to Britain.
B) could not defend the area and would lose it in any case.
C) received America's promise to give up claims to Oregon.
D) was pulling out of the Western Hemisphere.
E) thought the sale of Florida might stop American settlers and frontiersmen from further pushing into Texas and other parts of Spain's holdings in the Southwest.