Question

Why was Operation Sea Lion a failure?

a British citizens joined the war effort by fighting Germans in the streets of London.

b The German air force was unable to defeat the British air force.

c Nazi forces couldn’t tolerate the harsh British winter.

d The British navy repelled invading Nazi armies

Answer 1

It could then deploy when, or if, the Germans launched an invasion. Most historians agree Sea Lion would have failed regardless, because of the weaknesses of German sea power compared to the Royal Navy.
So the answer is b.

Hope this helps.