France decided America could defeat Britain and provided military.
Answer: Option A
Explanation:
In the Battle of Sara-toga the American army was placed between the Burgoyne’s army and Albany. The battle begun and in this the Burgoyne’s troops were thrashed. In mop-up operation that America followed many soldiers of Burgoyne’s men were captured.
This victory gave a fresh start and confidence for the American army. This victory also gave France the confidence that it can tie up with the American soldiers and capture British army. Later the American support was such a boon to the French which aided them military support and financial help.