In what way did the nation's growing transportation system help promote economic growth?
(1 point)
• It made it easier for Native Americans and freed African Americans to obtain the same goods as white people, boosting demand
• Because it added costs for the delivery of goods, it made more profits for the manufacturers.
• Railroad rebates and pools brought down prices for small farmers, who could then afford to modemize their equipment.
• It opened up national markets for selling and obtaining resources and helped lower costs of production.