congress responded to the railroad industry making agreements to reduce competiton and keep prices high in the late 1800s by a. creating the interstate commerce commision. B. offering a subsidy to small farmers. C. raising taxes on railroad owners. D. creating the social security administration.

Option a. Congress formed the Interstate Commerce Commission in response to the railroad industry's demand of railroad regulation.

Explanation:

This regulation was necessary to reduce competition and keep prices high that was prevalent during 1800. Post Civil war, railroads were run by private entities and it was largely unregulated. Railroad sector often charged small businesses more for shorter distance and provided rebates for larger businesses. On witnessing huge public outcry on the above, Congress passed the law with a five member enforcement board which is otherwise called Interstate Commerce Commission.

C. raising taxes on railroad owners.

Explanation:

The railway development expanded in the nineteenth century and generated a great industry, connecting the east coast with the west generated an expansion of trade and a greater fever for gold, in the same way so that this industry continued in a great boom and competition was not unfair, various taxes were created that generated that few people wanted to invest in this project