D) The need for raw materials, fuel, and markets for manufactured goods
The mining industry contributed to the development of railroads because the mining industry required transport routes to transport the goods that they mined to factories to be processed and urban centers to be finished and sold. Also they helped to contribute to the development of railroads by providing the metals and other inputs necessary to build the railroads themselves.
First they would have to be in a anti slavery state, there were also some wealthy African Americans in the time of slavery
Psychology is the correct answer
The U.S. Declaration of Independence states that "when a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government" (emphasis added).
