I believe the answer is B. <span>B. They invented tools using stones and metal </span>
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.
Samuel Slater
_________________________________
protectorate with the local government controlled by a foreign country. A foreign country can also exert a great deal of economic influence. One of the most widespread forms of imperialism was colonization.
Imperialism Examples and ColoniesFormer European Colonies in North and South AmericaBritain<span>BelizeCanada - British Columbia, Lower Canada, Nova Scotia, New Brunswick, Mosquito Coast, British Guiana Falkland IslandsNewfoundland and Labrador, North-Western Territory, Prince Edward Island, Rupert's Land, Upper CanadaSouth Georgia South Sandwich Islands<span>United States: 13 colonies, Oregon country in the Pacific Northwest</span></span>