Which of the following is true of Great Britain's participation in world war 2 in 1940

Royal Air Force won the Battle of Britain.

Explanation:

After most of the countries had fallen in 1940, Adolf Hitler prepared the German troops for an invasion of Britain. The battle was called Battle and fought between the Royal Air Force of Britain and the Luftwaffe, the air force of Germany. Back then, Britain was the only country in Western Europe fighting against Nazi Germany. However, the Royal Air Force of Britain refused to surrender and in the end, the plan of invasion of Britain proved futile.