Answer:
Option (C) is correct
Explanation:
Coke and Pepsi are substitute goods, which means that there is a positive relationship between the price of coke and the demand for Pepsi. If the price of coke increases then as a result the demand for Pepsi increases though the price of Pepsi remains the same and if the price of coke decreases then as a result the demand for Pepsi decreases.
This shows that cross-price elasticity of demand between Coca-Cola and Pepsi is likely to be Positive because both are substitute goods.