Air Fares Are Generally Lower on Tuesdays and Wednesdays Each

Multiple Choice

Air fares are generally lower on Tuesdays and Wednesdays each week.What is a likely explanation for this occurrence?

A) Supply is relatively variable, and lower demand on these days leads to a lower equilibrium price.
B) Demand is relatively variable, and lower supply leads to a lower equilibrium price.
C) Lower levels of both supply and demand on these days lead to a lower equilibrium price.
D) Supply is relatively fixed, and lower demand on these days leads to a lower equilibrium price.
E) Demand is relatively fixed, and lower supply leads to a lower equilibrium price.