How did the expansion of railroads accelerate the second industrial revolution in america? a. railroads created a true national market for u. s. goods. b. the division of time into four zones allowed businesses to communicate by telegraph for the first time. c. the adoption of a standard railroad gauge made private and federal land grants more available. d. large banks were now able to locate in western railroad towns?

The correct answer I believe here is A. The expansion of the railroad for the first time created a true national market in the US. With the advent of the railroad the goods could have been transported from one part of the country to the other relatively cheaply and efficiently. This also helped a lot of factories at that time as they could get the materials and the supplies they needed much faster than regularly and much more cheaply as the transport costs were significantly less than they used to be.