which of the following was the main reason Spain agreed so readily to sell Florida to the United States after so many years of actively colonizing it?

a Spain needed the money
b Spain feared a revolt in Florida
c Spain was busy fighting rebels in Latin America
d Spain knew it had a weaker military than the United States

The main reason Spain agreed so readily to sell Florida to the United States after so many years of actively colonizing it was d) Spain knew it had a weaker military than the United States.