Answer:
The first one.
Step-by-step explanation:
This is one of those questions that has no real choice; it's the best of a bad lot.
The idea behind using atomic weapons is that it was meant to shorten the war, not prolong it.
Germany had surrendered by the time the weapons came into being. Gemany was no longer a factor.
Most Americans had no idea the the Manhattan project existed. They did not have an opinion because they knew nothing about it.
I guess you have to pick the first one. Some scientists who new about it thought atomic weapons were immoral.