Question

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.

Explanation:

The transcontinental railroad's completion (in 1869) enabled faster, cheaper, and safer transportation of people and goods, drastically increasing westward migration. The Indian Appropriations Act, Wounded Knee battle (1890), and reservation system were more about Native American policy and occurred later or were less directly about facilitating settler movement west initially.

Answer:

the completion of the transcontinental railroad.