A Promoter Might Charge Less Than the Profit Maximizing Ticket

A promoter might charge less than the profit maximizing ticket price because

A) like most promoters, she has deeply-felt charitable instincts.
B) the talent that she represents may wish to play to a full arena for their own ego.
C) she knows that the facility has absolutely no alternative use on the day of the event.
D) all of the options are correct.