Suppose we observe a fall in the equilibrium price of walnutsand no change in the equilibrium amount of walnutsbought and sold. Which one of the following demand and supply changes is a likely explanation?

The supply increased and demand increased.

An increase in the number of walnut producers and an increase in the number of buyers.

The supply and the demand for walnuts bothincreased.

The law of supply is violated.

The supply of walnuts increased and the demand for walnutsdecreased.