How did the transportation system help the economy grow? It made it easier for everyone to buy goods. It made it easier for everyone to buy goods. It increased profits for manufacturers. It increased profits for manufacturers. It opened national markets and reduced production costs. It opened national markets and reduced production costs. It lowered prices for farmers. What’s the answer

All of the above. The transportation system helped the economy grow by making it easier for goods to be bought and sold, increasing profits for manufacturers, opening up national markets and reducing production costs, and lowering prices for farmers.