Lana cannot taste any difference between Coke (c) and Pepsi (p) and so she views one bottle of each as perfect substitutes. Suppose Lana has a weekly budget of 10 dollars on Coke and Pepsi. Under what price conditions is it certain that Dana will buy only Coke? Choose Only One Option.

Only when the price of Pepsi is 10 or more

None of the above conditions guarantee that Dana will buy only Coke

Whenever the price of Coke is lower than the price of Pepsi

Dana will always purchase a combination of Coke and Pepsi

Only when the price of Coke is 0