问题详情

Which of the following factors account for the limited impact of railroads in the 1860s？
A．Other modes of transportation did not come to an end when the first train appeared.
B．There was little government subsidy.
C．People doubted that railroads stretching desert, mountain, and semiarid plain could be profitable.
D．Economists and congressmen strongly opposed the idea of linking the East and West together through railroads.请帮忙给出正确答案和分析，谢谢！