How did the north’s superior railroad system give it an advantage during the civil war

Which of the following arguments decided the debate over using the atomic bomb against japan in 1945? using the bomb would destroy the armaments still available to japanese forces in japan. using the bomb would demonstrate the power of the united states to the entire world. using the bomb would shorten the war and avoid heavy casualties among invading troops. using the bomb would enable allied forces to invade and take over the japanese mainland

Someone who accepted the beliefs of social darwinism would have also agreed with which of these statements?

Once the constitution was approved, what more had to happen before it could go into effect?