Which of the following people is making a decision based on opportunity cost?
A.
Ralph does not fix his broken fence because he wants to spend his money on a new TV.
B.
Donald tries to drive less often because the price of gas has become more expensive.
C.
Leonard places his money in a savings account so that he will be able to use it in the future.
D.
Michael decides to buy two cinnamon rolls because he will receive the third roll for free.