In QM$\text{'}$s linear program solution, shadow prices are given in the

a$.$ row of "Solution"

b$.$ column of "Dual"

c$.$ objective function

Suppose the shadow price of material clay is $$18$ in a linear program of proc maximizes total profit. Which of the following best explains the meaning of the

a$.$ The $$18$ shows the unit price of clay.

b$.$ The $$18$ show the unit profit of clay.

c$.$ The $$18$ shows the profit increase if one more unit of clay is available.

d$.$ The $$18$ shows the price of clay in the black market.

e$.$ The $$18$ shows the average unit cost of clay.