What factors enabled the united states to become a major industrial power? including gains from trade

The United States was able to become a major industrial power due to an abundance of natural resources needed in the industrialization process, an abundance of labor, technological developments, trade, and its ability to export products across its oceans and also land bordering neighbors. Through an increasingly productive workforce and mechanized manufacturing the United States was able to make enormous gains throughout its period of Industrialization and become a major industrial power. 

Cwould be the answer