Figure 13-2 the Figure Below Depicts a Total Cost Function for a for a Firm

Figure 13-2
The figure below depicts a total cost function for a firm that produces cookies.

-Refer to Figure 13-2.Which of the statements below is most consistent with the shape of the total cost curve?

A) Producing an additional cookie is always more costly than producing the previous cookie.
B) Total production of cookies decreases with additional units of input.
C) Producing additional cookies is equally costly, regardless of how many cookies are already being produced.
D) Producing additional cookies becomes increasingly costly only when the number of cookies already being produced is large.