Consider the Global Market for Barley,an Agricultural Commodity

Consider the global market for barley,an agricultural commodity.Suppose that in August,2014,the equilibrium price and quantity were P = $150 per tonne and Q = 350 million tonnes.In August,2015,the equilibrium price and quantity were P = $150 per tonne and Q = 410 million tonnes.Which of the following is the best possible explanation for this change in market equilibrium?

A) There has been a decrease in supply of barley.
B) There has been an increase in demand for barley.
C) There has been a simultaneous increase in demand and increase in supply of barley.
D) There has been a simultaneous increase in demand and decrease in supply of barley.
E) There has been a decrease in demand for barley.