1.) The best explanation for the reason why the UNited States decided to target Hiroshima was it was geographically suited for bombing and evaluating the results of the bombing. There were hoping that this bomb would finally end the war. The correct answer is A.
2.) President Truman made the decision to drop the bomb, but the Manhattan Project and the development of the bombs were made by General Dwight D. Eisenhower. He was actually over the entire project The correct answer is B.
3.) The Potsdam Declaration issued issued the ultimatum to Japan that it had agreed to surrender immediately to Allied Forces. If they didn't surrender immediately after signing they would face "prompt and utter destruction." The correct answer is A.