The Average Cost Per Seat on an Airplane Trip from Toronto

Multiple Choice

The average cost per seat on an airplane trip from Toronto to Halifax is $300. Suppose no refreshments are served and seven seats are empty. How could the airline company increase its profit?

A) if it charged no less than $300 for the seven remaining seats
B) if it charged more than $300 for the seven remaining seats
C) if it charged any ticket price above $0 for the remaining seats
D) if it left the seats empty