I believe the answer is C. Hope this helps
Financial and military assistance from France.
Serfs may eventually work their way to freedom (usually not), if you know the term tenant farmers, individuals who work on a property with some believe that eventually they may pay their debts off and become a freeman. An enslaved person, will never believe that they will eventually become free.
-My opinion anyway (probably wrong) but worth a try.
The immigrants were looking for economic stability
i think it might be salt water posing