Answer:
D) Slaughterhouse conditions were even worse than Sinclair had reported.
Step-by-step explanation:
Upton Sinclair was the author of the popular fiction book "The Jungle" where he discussed the conditions of the meat packing industry. Although his story was based on fiction, it had to do with some of the real life experiences he had, working in the meat industry in Chicago.
Because of the reaction the novel generated, the US government sent health inspectors to meat packing plants and they found out that the Slaughterhouse conditions were worse than they were reported by Sinclair.