Which of the following statements is correct?

Select one:

a.If there is a shortage at a given price then that price is less than the equilibrium price.

b.If there is a surplus at a given price then that price is equal to the equilibrium price.

c.If there is a surplus at a given price then that price is less than the equilibrium price.

d.If there is a shortage at a given price then that price is greater than the equilibrium price.