Why Is There a Toll-Free Phone Number Printed on Each

Why is there a toll-free phone number printed on each carton of Coca-Cola?

A) to provide the customer with after-the-sale service
B) to make sure that customers understand the implied and express product warranties
C) to remove any possibility of liability
D) to make sure the product stays in the growth stage of its product life cycle
E) to differentiate it from its competitors