What event in 1859 encouraged the settlement of mid-America?

A) end of the Mexican War
B) completion of the transcontinental railroad
C) discovery of gold in Colorado
D) creation of a winter pass through the Rockies

Settlement of Mid-America

The historical process of populating and developing the central regions of the United States, involving migration, cultivation of land, and establishment of communities.

Discovery of Gold

The finding of gold deposits, often leading to gold rushes and mass migrations of people seeking wealth, significantly impacting local economies and societies.

Transcontinental Railroad

A continuous network of railway trackage that crosses a continental land mass with terminals at different oceans or continental borders.