Which Example Illustrates Wage Disparity Due to Compensating Differentials

Multiple Choice

Which example illustrates wage disparity due to compensating differentials?

A) Clerks at a Gap in Toronto earn more than do clerks at a Gap in Abitibi,Quebec.
B) People with graduate degrees usually have higher earnings than do people who did not graduate from high school.
C) The football coach at the University of Toronto earns more than does an economics professor.
D) Crab fishermen on the Bering Sea earn more than do clerks who sell goldfish at a pet store.