Question

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.

Explanation:

The key consideration in the decision to use the atomic bomb was minimizing U.S. military casualties. The argument that using the bomb would shorten the war and avoid heavy casualties among invading troops was a major factor. Destroying armaments was not the main point. Demonstrating power was a secondary aspect. The bomb was not used to enable an invasion (it was thought the bomb could end the war without a full - scale invasion).

Answer:

Using the bomb would shorten the war and avoid heavy casualties among invading troops.