Ken has $10 and six hours to go shopping. He has enough time to look at many items to buy but only has enough money to buy one thing. He concludes that his money is scarce but his time is not. Evaluate Ken's reasoning.
A. His time is scarce, not his money, because he could use his time to do something that does not cost any money.
B. Both his time and money are scarce because there are other ways he could spend his time and money.
C. Both his time and money are scarce because he cannot buy all the items he wants to while shopping.
D. His money is scarce, not his time, because he cannot buy all the items he wants even though he has enough time to look.