有兩題mc想問一下的.
1.Suppose sam has a one-day off. He has to choose one of the two activities: going on a trip to macau or playing computer games at home. Why does Ben need to make a choice?
A.He does not want to pay a cost.
B.He is facing the problem of scarcity.
C.The values of two wants are different.
D.He wants to realise two wants by making a choice.
2. Which of following decisions involve(s) opportunity cost?
(1) Marco takes a one-day leave from the company to celebrate his grandfather's birthday.
(2) Edison obtains the textbook and stationery grant from the government to buy the textbooks.
(3) Sammie donates the money for buying cosmetics to help the victims of South Asian Tsunami.
A.(1)ONLY
B(3)ONLY
C (1) & (3) ONLY
D (1),(2) AND (3)