Saratoga is considered the "turning point" of the American Revolution primarily because the American victory in that battle in 1777 significantly bolstered American morale and demonstrated to potential allies, particularly France, that the colonists could defeat the British.
The correct option among the statements provided would relate to the French support. Following the American victory at Saratoga, France recognized the United States and entered into a military alliance with them in 1778. This alliance provided crucial military assistance, including naval support, which was vital for the American cause.
In summary, the significance of Saratoga lies primarily in its role in persuading France to join the revolutionary effort as an ally for the American colonists, thus shifting the dynamics of the war.