The Price Elasticity of Demand for a Certain Agricultural Product

The price elasticity of demand for a certain agricultural product is constant (over the relevant range of prices) and equal to -1.50. The supply elasticity for this product is constant and equal to 4. Originally the equilibrium price of this good was $15 per unit. Then it was discovered that consumption of this product was unhealthy. The quantity that would be demanded at any price fell by 11%. The percent change in the long-run equilibrium consumption of this good was

A) -11%.
B) -8%.
C) -2%.
D) -12%.
E) There is not enough information to determine the answer.