In this excerpt, what does "ammunition " mean? A means to settle a conflict B materials fired from a weapon C fighters trained for warfare D supplies used to prevent a problem With all that purified water lying around, astronauts would now have plenty of ammunition against one of the worst things that can happen in space: a fire. But how were they to know that a fire had broken out? NASA engineers began work on something we consider an absolute household necessity these days: the smoke detector.