Answer:
B. American and French troops combined with the French Navy to soundly defeat the British forces.
Step-by-step explanation:
Only option B is the correct answer as the British were forced to surrender when American and French troops united to besiege the city. French navy defeated the British troops in the naval battle, which led to siege of the city.
Washington's troops were helped by French general Comte de Rochambeau.
All other options are not correct as French army played an important role in the battle.