What government inspectors investigated the claims made by upton sinclair in the jungle, they found that

Upton Sinclair's novel, The Jungle, was written to show the world how cruelly and harshly immigrants in industrialized cities were treated in the early twentieth century. At first, the claims that Sinclair made in his novel were thought to be outlandish and over exaggerated. However, when government officials actually looked into the claims, they found that conditions were even worse than what Sinclair had said. Hope this helps.