Answer:
Well, the way I understand it, the power of a single voice is referring to a piece of literature being able to convey a powerful and life changing message. The literary piece does not need to be complicated or be written by multiple people, it just needs to be compelling and leave an impact on the reader.
1. his name is not a jim crow
2. he's not a guy
3 he's not a person
4 this was made when blacks were segragated
5 it is a play
The "great packing machine" refers to the slaughter industry the author describes through the book. He is trying to portrait and denounce the unhealthy, dangerous, almost-enslavement condition the workers suffer in that industry.
The answer is<em> D. Irony/Sarcasm.</em>