Which of these statements best describes the zero(s) of this function?

A.
2 and 16 are the zeros, and indicate the ticket price for which the profit is 0

B.
9 is the zero, and indicates when profit is at the maximum

C.
0 and 18,000 are the zeros, and indicate the number of tickets sold.

D.
-12,000 is the zero, and indicates the cost to put on the concert