Why did Truman decide to use the atomic bomb to end the war?

to show the world a new superweapon

to quickly end the war without an invasion

to test the effects of an atomic bomb on a city

to keep the Russians from entering the war

What prevented the success of mao zedongs great leap forward? a- the people focused too much on tending their farms and not on industry. b- the goods being made were fewer and lower quality than expected. c- too little house in existed for everyone who wanted to live in communes. d- industry and mining operations in the cities required too many people. (the right answer will get brainliest)