Answer:
The correct answer is letter "D": Pepsi to the right.
Explanation:
The demand law states that when the price decreases, the quantity demanded will increase -moving the demand curve to the right, and when the price increases, the quantity demanded decreases -moving the demand curve to the left. The price-quantity demanded relation is inversely proportional.
Thus, if the price of Pepsi decreases, all else constant -ceteris paribus, the quantity demanded will increase moving the demand curve to the right.