Answer:
B) Revenue Passenger Miles (RPM)
Step-by-step explanation:
Revenue passenger miles are the most relevant metrics i.e. used for transportation. It reflects how many numbers of miles it traveled by a particular passenger. It considered the efficiency and the profitability earned by the company based on the number of passengers. The payment could depend on the number of miles chosen by the passenger
So in the given situation, option B is most relevant and hence it is the right answer