For an Airline, the Price of Economy-Class Seats on Any

For an airline, the price of economy-class seats on any given flight may fluctuate over time. For example, the airline may try to fill economy-class seats by lowering the price as the day of the flight draws closer, or try to fill business-class seats first by raising prices on economy tickets. This is an example of

A) price skimming.
B) odd pricing.
C) dynamic pricing.
D) market pricing.
E) seasonal discounts.