What convinced the Spanish to negotiate with the Americans?

Andrew Jackson's presence in Florida. This treaty, signed in 1819, settled all border disputes between Spain and the US. Spain gave east Florida to the US, and the US gave up its claims to what is now Texas.

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the answer would be option c. the chief result of u.s. participation in world war i is that, the u.s. forces ended the stalemate and led to an allied victory. after the us joined wwi, the allies had the forces they need to triumph. hope this is the answer that you are looking for.

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