Answer:
The correct answer is B: unofficial colonial groups.
Step-by-step explanation:
The Battles of Saratoga marked the important victory of the American colonies over the British army in the American Revolutionay War, in which the british general John Burgoyne had to surrender on the 17th of october in 1777 to the american general Horatio Gates. This fundamental victory led to the incorporation of France as an ally of the americans in the war, and later the spanish army also joined against the british.