Which term is reflected in that idea that to choose something you have to give something else up?
scarcity
opportunity cost
comparative advantage
benefits of trade

What was the main point of truman doctrine ?

Which of the following events happen during president hardings term? a) the supreme court decided to break up large corporations. b) the supreme court strength and state laws protection labor union. c) the supreme court ruled in favor of extended regulations of child labor. d)the supreme court made it easier for large businesses to operate.

Historians sometimes rely on video recordings in researching past events because