For any given good, other things being the same, an decrease in the price of a substitute good will typically: a. Cause both the demand curve and the supply curve to shift to the left b. Cause the supply curve to shift to the left, thus creating a rise in the equilibrium price c. Cause the supply curve to shift to the left, thus creating a fall in the equilibrium price d. Cause the demand curve to shift to the left, thus creating a fall in the equilibrium price