To be exact it is 15 or b hope this helps!
Railroads helped the US grow by making settlement in the West possible after the Civil War by connecting farmers (miners, ranchers, loggers, and others) to markets. there people and companies could both ship their produce to markets as well as ship in the machinery and supplies they needed. It was the only way to move large amounts of things quickly.
Answer:
Most definitely A if wrong then choose B
Explanation:
Sorry if wrong- lol