Respuesta :
Here is the answer to the given question above. The social problem that Upton Sinclair's 1906 novel "The Jungle" described was the the living and working conditions in Chicago's meat packing factories. Sinclair wrote the novel to portray the harsh conditions and exploited lives of meat packing industries. Hope this answer helps.
The choices:
A. the ruthless business methods of John D. Rockefeller and Standard Oil
B. the struggles of black Americans
C. the living and working conditions in Chicago’s stockyards
D. the conflict between California farmers and the Southern Pacific Railroad
the answer is C