Southern Airlines implements a 40% discount on new teacher tickets. This is actually a business strategy to attract passengers. The airline did not actually profit, because when the full capacity of a flight exceeds 90% on a certain day, the discount on that day will be suspended. Low-price tickets, and even at peak times, flight occupancy rates rarely exceed 90%, with seats available, why not promote at a discounted price? Which of the following, if true, would most effectively weaken the above argument? ['Most teachers and passengers do not choose Southern Airlines flights because of discounted fares.', "The average full capacity of the airline's flights throughout the year is 50%.", 'Implementing teacher discounted fares is a way of showing respect for the profession of teachers and should not be evaluated from a utilitarian perspective.', 'When the company implements discounted fares for teachers, it implements seasonal price adjustments.']