Question

Which was a result of Upton Sinclair's muckraking novel The Jungle?

A.
Corrupt politicians in several major American cities were voted out of office.

B.
Americans learned about the filthy conditions in meat-packing houses.

C.
Congress passed a law banning child labor in factories and mines.

D.
Public opinion swung overwhelmingly in favor of war with Spain.

Answer 1

One major result of Upton Sinclair's muckraking novel The Jungle was that "Americans learned about the filthy conditions in meat-packing houses", since this led to the "Meat-Packing Act". 

Answer 2

B. Americans learned about the filthy conditions in meat-packing houses.