Answer: Substitutionary Effect.
Explanation:
The new coke drink the very berry coke, has reduced the consumers demand for it's original product the Cherry Coke, which is as a result of the extra special flavors of the new drink: this is a typical example of the Substitutionary effect.
Substitutionary effect occurs, when consumers replace their demand for an existing product to go for a similar product of better quality or cheaper price range.