-In Figure 4

-In Figure 4.2 , the reason that point D is higher than point C and C is higher than B is that

A) it always costs more money to increase output.
B) small levels of production are often inefficient and that significant increases in production can occur thereafter at only a small additional cost.
C) it is very difficult and very expensive to increase output once the capacity of the machinery has been reached.
D) there is waste.