Question

the most significant effect of the american victory at saratoga was the defeat of the british forces in america. the entry of france and spain into the war. the betrayal of benedict arnold.

Explanation:

The American victory at Saratoga was a turning - point. It convinced France and Spain that the Americans had a real chance of winning, leading to their entry into the war on the American side. The British forces were not fully defeated in America at Saratoga, and Benedict Arnold's betrayal was not a direct result of the Saratoga victory.

Answer:

the entry of France and Spain into the war.