Are Markets Always in Equilibrium

Multiple Choice

Are markets always in equilibrium?

A) Yes, they are always at the equilibrium point, or very close to it.
B) Yes, because few things tend to alter supply and demand.
C) No, but if there is no interference, they tend to move toward equilibrium.
D) No, they never "settle down" into a stable price and quantity.
E) Uncertain, economic theory has no answer to this question.