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.
Oil. it is a finite resource
Their geography made growing crops difficult. The land was mountainous. They were however, known for growing grapes and olives.