Which of the Following Demonstrates Opportunity Cost

Multiple Choice

Which of the following demonstrates opportunity cost?

A) With a new strain of wheat,the wheat crop of Canada grows by 20% with no change in the productive resources devoted to wheat farming.
B) A tax cut increases people's purchases of consumer goods and decreases state expenditures on education.
C) The ravages of World War II reduced Japan's ability to produce goods.
D) Flora gets a 10% raise and increases her expenditures on movies.