Which Situation Best Illustrates a Marginal Change

Multiple Choice

Which situation best illustrates a marginal change?

A) Nancy retires and takes a part-time job. She was working 40 hours per week, but now works 10 hours per week.
B) Provincial University has announced that due to provincial budget deficits, tuition must rise by 25% next year.
C) Adam moved from Edmonton to Toronto and now pays 40% more for rent than before.
D) Banff, which usually receives 600 cm of snow per year, received 620cm last year.