Recall the Application About Major League Baseball,how Are Average Salaries

Recall the application about major league baseball,how are average salaries of MLB players determined?

A) based on the MRP of a player that equals his contribution to the firm's total revenue from ticket sales and television contracts
B) Firms use a specific formula that is determined by multiplying the total revenue from the player and the total cost.
C) based on the diminishing return from each player
D) based on the years that players have been with one team