Which best describes why chinese workers were used to construct the transcontinental railroad?

Is the idea of containment relevant to american foreign and policy today why or why not

The line dividing regions 4 & 5 on this map is known as the "fall line." which of these represents an important factor of the fall line in georgia history? a) it was the first boundary of the georgia after it became a state. b) it was an important source of power due to a change in elevation. c) it was once home to major cities that have since become abandoned. d) it was a dividing line between the united states and native american territories.

The soviet union and the united states believed in two very different economic systems. what were the names of each?