Which of these events first allowed many more settlers to move west? the completion of the transcontinental railroad.
the passing of the Indian Appropriations Act.
the defeat of American Indians at the battle at Wounded Knee.
the institution of the reservation system.

The completion of the Transcontinental Railroad

Explanation:

Transcontinental Railroad was completed in 1869 by the Central Pacific and the Union Pacific Railroad Companies. The railroad link the eastern part of the United States to the western part of the United States.

This later led to many more settlers to move west. As the journey seems easier and the prospect of moving to the west to start afresh and get abundant land appeals to people at the time.

answer placeholder because the system is messed up