Answer:
B
Explanation:
The warlords gained power after the Han government called upon them to deal with the Yellow Turban rebellion
<span>The shortage was of people. Without enough individuals to hold the new land and therefore to gain control and power of the area, colonialism in the Caribbean proved to be a difficult task. Without the necessary human cargo to keep intruders out of the newly acquired land and to ensure that everything is running smoothly, it is nearly impossible to create an expansion of economic power.</span>
A) Railroads
Railroads helped to transport resources, manufactured goods, and people all over North America, greatly speeding up the industrialization of the entire continent, especially the United States. Where as industrialization previously existed mostly along coastal cities where materials could quickly be shipped to and from industrial centers, the entire continent was now much more easily accessible for this.
