How did the growth of the railroads affect supply and demand for natural resources in the United States? increased the supply decreased the demand increased the demand had no effect on the supply and demand

A) increased the supply

It increased the supply. It was now made possible to make things and quickly transport them across the entire United States of America which meant that it was possible to make more of it. As a result, many people didn't have to worry about things such as food anymore because it took a lot faster to get to them so they could buy instead of having to grow their own food.