If a game is not sold out, the marginal costs to a team accommodating one more fan is(a) almost infinite.(b) half the average ticket price.(c) essentially zero.(d) the inverse of marginal costs.

(c) Essentially zero.

Explanation:

The cost of accomodating one more fan in a stadium that is not at full capacity (the game is not sold out) is almost zero because the stadium has the infraestructure to accomodate hundreds or thousands of fans.

The only cost is probably cleaning after the fan in case he or she throws away something in in or around his or her seat.

answer; /// i believe its (bas design);

eds? ederal government or feds