The correct answer is B) it led to France entering the war.
The Battle of Saratoga marked a turning point in the war in that it led to France entering the war.
The Battle a Saratoga represented a major turnaround in the morale of the troops of the Continental Army that were having many difficulties to fight the experienced army of Great Britain.
It was a hard-fought win for teh Patriots that made the Continental Army feel confident that they could defeat the English, and after the victory, European countries such as France decided to openly support the United States and sent troops and war supplies to America.
Definitively, the presence of France in the Revolutionary war was decisive for the Continental Army to win the war.