The answer is given by the second sentence which explains that “Railroads provided cheap and fast transportation for both raw materials and products.”. Aside from this, another reason was because agricultural products were being overproduced by that time. There were too many products available in the market which is why the prices became too low.
Railroads provided cheap and fast transportation for both raw materials and products.
Explanation:
When the cost of production drops, the sellers and merchants are able to offer a better-lower cosot for their buyers, when the railroads started expading, the new-cheaper way of transportation made it possible for products and raw materials to lower their production cost, this meant that they were able to offer the same products and materials at a cheaper cost.
Since the Constitution was written in the 1770s there needs to be a law allowing it to change. As society becomes more evolved the constitution needs to be able to evolve with it. Many laws in the original constitution no longer apply so they have been removed to keep up with the times.