During world war ii, germany gave up its plans to invade great britain because one of the options below as your
a. the united states joined in the war against germany
b. germany failed to destroy the british air force
c. the soviet union threatened to attack germany in the east
d. hitler expected britain to resume its appeasement policy

It's b) Germany failed to destroy the British Air Force.

In the UK the Royal Air Force was one of the strongest air forces among the Allies during WWII, not to mention their navy was also one of the largest. Bottom line: it was impossible to invade UK properly because they weren't able to take over the UK's military and destroy it from the inside out.

Thomas edison created the light bulb.