Question

Which of the following best describes the main way that Upton Sinclair gathered research for The Jungle?
He hired investigators to spy on activities in a meat-packing plant.
He spent two years doing research in libraries all over America.
He went undercover as a worker in a meat-packing plant.
He interviewed experts in the meat-packing industry.

Answer 1

He went undercover as a worker in a meat-packing plant.