Answer:
People turned to religion and spiritualism to cope with the unprecedented number of deaths.
Many clergy in the North professed that the war was God's instrument to rid the nation of slavery and turn it into the true land of freedom.
In the 1920's and 1930's gained popular support was by appealing national pride. So it’s C hope it helps :D
They probably had no other choice. During that time, it was hard to get a job with a solid pay for many people (especially immigrants). If they decided to quit, they would have to find other jobs, which probably have bad conditions as well. If they couldn’t find any good jobs, then they would basically become homeless and wouldn’t be able to pay for themselves and their families. (Back then, families were much more important.)