In the Case Study About Energy Drinks, What Is the Controversy

In the case study about energy drinks, what is the controversy?

A) The manufacturers claim they are low-calorie, but they really aren't.
B) The manufacturers claim they are caffeine-free, but they really aren't.
C) The manufacturers claim that they have many benefits, but they really just deliver caffeine.
D) The customers claim that energy drinks are overpriced.
E) The commonly used ingredient taurine may be dangerous.