Explain how the Battle of Britain was a turning point in World War?

This stopped the steady invasion of The Lightning war or "Blitzkrieg"

Explanation:

The battle over Britain was a time of silent dread, waiting for the Germans to come onto the British soil was a terrifying image to overcome. The Blitzkrieg has toppled over the other countries with supposed large and proud militaries in a matter of weeks. Britain was in several words literally the last man standing. By some Miracle, the British pilots were more skilled, and held their ground until Operation Barbarossa, which led to Germany diverting resources to Russia.

the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.

this is a good question! i'll do some research and come back when i have the answer!