B.)The power to veto proposed federal legislation
To recap, self-interest and competition are very important economic forces. Self-interest is the motivator of economic activity. Competition is the regulator of economic activity. Together they form what Adam Smith called the invisible hand, which guides resources to their most valued use.
One important gain by the colonist after the French and Indian war is that they gained more land.
NATO was created to counter Russia's (formally USSR) military power and it has expanded in recent years.