What was the immediate effect of america's use of atomic weapons in august, 1945?

a)
it brought about the unconditional surrender of japan and ended the second world war.
b)
it gave the u. s. military a base from which it could launch an invasion of mainland japan.
c)
it brought about the uncondtional surrender of germany and stopped the soviet union from occupying berlin.
d)
the use of atomic weapons resulted in a massive "kamikaze"-style counter-offensive from the japanese military.

The correct answer is A) It brought about the unconditional surrender of Japan and ended the Second World War.

President Harry Truman decided two use two atomic bombs on the cities of Hiroshima and Nagasaki in August of 1945. The goal of these attacks were to bring an immediate end to World War II. This was seen as a last resort for Truman, as he and other leaders of the Allied powers already asked the Japanese to surrender. The Japanese refused to an unconditional surrender. If the US did not use these weapons, the war could have lasted significantly longer.

so they can defeat there oppenent