The correct answer is B) it won the Americans a foreign ally.
The outcome at Saratoga was important because it won the Americans a foreign ally.
The victory of the American troops in the Battle of Saratoga was the key moment that changed the conditions during the Revolutionary War. On October 17, 1777, the British troops surrendered. The victory convinced France that it had to ally with the Continental Army and its leader, General George Washington. The French help the American Army with supplies and weapons.