What factors contributed to the westward expansion of the U.S.?

the Cold War
decreased immigration
the discovery of gold
the Homestead Act

Respuesta :

The Homestead Act.

Signed into law in May 1862, the Homestead Act opened up settlement in the western United States, allowing any American, including freed slaves, to put in a claim for up to 160 free acres of federal land.
D. the homestead act