Recall the Application About the Manufacture of Fake Killer Whales

Recall the Application about the manufacture of fake killer whales used to scare sea lions off the Washington coast to answer the following question(s) .
-Recall the Application.According to the Application,it would cost about $16,000 to make the first whale,including $11,000 for the mold and $5,000 for labor and materials.Once the mold is made,each additional whale would cost an additional $5,000.Why is the mold an indivisible input?

A) because it cannot be scaled down and still produced the whales
B) because the cost of producing the mold is not visible in the total cost
C) because it can be scaled down and still produce the whales
D) Both B and C are correct.