(1 pt) why did truman decide to use the atomic bomb to end the war? a. to test the effects of an atomic bomb on a city b. to quickly end the war without an invasion c. to keep the russians from entering the war d. to show the world a new superweapon

B. Because an invasion of japan's mainland would have meant the loss of thousands of American lives, many analyst's discussed it and said between 500,000 - 1 million lives could have been lost during the invasion due to how dug in and defended Japan would have been. Including their miles and miles of underground tunnels