Question

1. the work of this muckraker led to the passage of the meat inspection act.

jacob riis
ida b. wells
web dubois
upton sinclair

Explanation:

Upton Sinclair's 1906 novel The Jungle exposed unsanitary and unsafe conditions in the U.S. meatpacking industry. The public outcry from this work directly pressured the U.S. government to pass the Meat Inspection Act of 1906. The other listed figures focused on different reform issues: Jacob Riis documented urban poverty, Ida B. Wells led anti-lynching efforts, and W.E.B. DuBois advocated for African American civil rights.

Answer:

Upton Sinclair