Answer:
The natural resource that became more available to the American public as a result of railroad expansion is coal. As a result of rail road expansion, it was discovered that coal can be used as a source of energy which was also the most cost efficient at that time.
Explanation:
The natural resource that became more available to the American public as a result of railroad expansion is coal. As a result of rail road expansion, it was discovered that coal can be used as a source of energy which was also the most cost efficient at that time.
