Answer:
- Limited number of bombs
- No guarantee the demonstration would work
Step-by-step explanation:
At the time the U.S. dropped the atomic bombs on Japan, there were only two bombs produced. There was a worry therefore that sparing one bomb simply for a demonstration would be a waste.
There was also no guarantee that the demonstration would work because the Japanese had shown themselves particularly stubborn in the struggle. A situation might have arrived therefore where the Americans would demonstrate the bomb and the Japanese would keep fighting which would have meant that the bomb was wasted.