Four airline operators A, B, C and D operate on a popular route between 2 cities, Rome and Venice in Italy. Airline A wanted to increase the number of seats sold, so they reduced their fares for this route. Airlines B, C, D imitated this move immediately. The general belief is that the volume of air travel between Rome and Venice would increase as a result of this. Which of the following statements, if true, would add trust to the general belief?

A: All 4 airlines see increased profits. B: Airlines start slashing rates for other routes as well. C: A study shows that around 80% of air travel in Italy is company sponsored. D: A study shows that air travellers in Italy are price sensitive.