Which of the following best describes the federal government's response to upton sinclair's the jungle?

a. congress immediately passed legislation that regulated the meat-packing industry.

b. congress passed legislation that regulated the meat-packing industry only after sending a team of government investigators to plants and slaughterhouses.

c. congress did not believe sinclair and told the public that the facts in his book were false.

d. congress passed legislation that protected the leaders and business owners of the meat-packing industry.