Answer:
The correct answer is option D.
Step-by-step explanation:
Coke and Pepsi are substitutes, a decrease in the price of Pepsi will cause the quantity demanded for Pepsi to increase and demand for Coke to decrease. The decrease in quantity demanded will cause the demand curve to move to the left. The equilibrium price for coke will decrease.
But this will not cause a further change in demand curve. The demand curve will not move to the left due to change in price. So, this statement is not true.