Military and political leaders in the united states during world war ii publicly justified the use of atomic weapons on japan because they argued that a) japan had first attacked the united states at pearl harbor four years earlier. b) the sites chosen for bombing were military bases, absent of civilian population. c) it would save perhaps a million lives that would be lost in an amphibious assault on japan. d) the japanese already had an atomic bomb and were preparing to deploy it against the united states.