The decision to use atomic weapons to end World War II was made by President Harry S. Truman, even though he was aware of the high number of civilian casualties that Japan would suffer. What evidence offers the best support for his decision to use the weapons

Explanation:

Truman and his military commanders knew that a mainland invasion if Japan would be costly and tens of thousands might perish, and among those casualtiea, there would still be Japanese civilian casualties, so Truman decided this would be a good decision for both sides.