Which of the following best describes "economic thinking?"
A. How young children are when they learn about spending.
B. The way highly educated people predict the stock market.
C. How people choose what to do with their own money.
D. How people choose to lose their money.

The school cafeteria can make pizza for approximately $0.30 a slice. the cost of kitchen use and cafeteria staff runs about $200 per day. the pizza den nearby will deliver whole pizzas for $9.00 each. the cafeteria staff cuts the pizza into eight slices and serves them in the usual cafeteria line. with no cooking duties, the staff can be reduced by half, for a fixed cost of $75 per day. should the school cafeteria make or buy its pizzas?