railroads not only led to an increase in the ability to transport raw materials, but they also led to…

railroads not only led to an increase in the ability to transport raw materials, but they also led to a(n)\ndecrease in the need for raw materials.\nincrease in the demand for raw materials.\ndecrease in the uses of raw materials.\nincrease in the types of raw materials found in the united states.
Answer
Brief Explanations:
Railroads made transportation of raw - materials easier. This led to more industries being able to access raw materials, thus increasing the demand for them.
Answer:
increase in the demand for raw materials.