Suppose you bought a concert ticket from Ticketmaster for $50, but when you got to the concert scalpers (individuals who re-sell tickets at the event) were selling tickets in the same seating area as yours for $25. What is probably true?

Economics is the study of:

Economists recognize that because people have limited resources:

Economists recognize that because people have limited resources: A.our future is bleak. B.they will never be happy. C.they have to make trade-offs. D.government intervention is necessary. 正确答案：they have to make trade-offs.

The Scarcity Principle states that:

An implication of scarcity is that:

An implication of scarcity is that: A.people must make trade-offs. B.people will never be happy. C.some people will always be poor. D.making trade-offs becomes unnecessary as wealth increases. 正确答案：people must make trade-offs.