The following expression models the total money earned by setting up a food stall at a funfair, where x represents the number of cheeseburgers sold. What does the constant term in the above expression represent? A. The maximum number of cheeseburgers sold by the food stall at the funfair. B. The cost of setting up the food stall even if no cheeseburgers were sold. C. The total money earned by setting up the food stall. D. The cost of each cheeseburger at the food stall.