America as a whole became “paranoid”, and declared a “war on terrorism”
I think it is the last one
Comparative advantage. It is being able to produce goods by using fewer resources, at a lower opportunity cost, that gives countries a comparative advantage. The gradient of a PPF reflects the opportunity cost of production. Increasing the production of one good means that less of another can be produced.
France had a strong army.
Americans would be stopped in their expansion of manifest destiny.
