The correct option is "D" (They can avoid taxes by moving the company location). And many large corporations are using this advantage to maximize their profit. For example if US has a higher tax compare to India/China, most likely most of the corporations will move to India/China. So that they can pay less tax thus maximize their profit.
Americas desire to move westward is good because it has much different climate and it prevents it from becoming overcrowded. Two conflicts that occurred are more people wanting to go and people dying on the way to a new state.
