Which event convinced president truman to drop the atomic bomb?

There are a couple of events that led to the President Truman's verdict to drop the atomic bomb:

1) Japanese leaders failed to heed the warnings and surrender.

2) Japanese belief that they were the 'chosen' people, and would fight to the death to allow the Japanese 'Empire' to continue to survive.

3) Operation Downfall, Olympic, & Overlord proved to be costly and had a high chance of having large amount of casualties.

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in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.

answer: the third option is your answer

explanation: