The emancipation of slaves (civil war)
I’m not sure if it’s correct but c) the nation as a whole, would probably be the best answer to go with.
( sorry if it’s wrong)
A. Yes They were willing to work dangerous jobs for low wages.
Japan must surrender without any conditions, or face destruction.
The intent of the passage is clear that the government of Japan has to surrender unconditionally and also commit to such action by providing assurance. Failure to do that will result in Japan facing destruction