Answer:
Option A, The airlines fly identical planes, with the same type of seat and the same amount of legroom for customers.
Step-by-step explanation:
Option “A” is correct because a firm or company compete on prices if the product offered by every firm are identical. additionally, if the product can not be differentiated then the firm can compete on the basis of price. Therefore, if two airlines fly identical planes and provide identical services like the same seat and the same amount of leg space to the customers.