It is quite a tricky question, but, I would say correct answer is only
A) Spain seceded Florida to Britain.
Last negotiator, french diplomat Étienne-François de Stainville, duc de Choiseul, proposed that the non-American territory was redistributed among Great Britain, France and Spain the following way:
- Britain would gain alll French territory west of the Mississippi
- French terrotories east of the Mississippi would become Spanish
- Spain would retain Cuba in exchange of handding Florida over to Great Britain.
