In Which of the Following Circumstances May a Member State

In which of the following circumstances may a Member State be allowed to rely on the precautionary principle?

A) When the potentially dangerous effects of a phenomenon, product or process have been identified by a scientific and objective evaluation, but this evaluation does not allow the risk to be determined with sufficient certainty.
B) When there is a genuine risk that the product in question endangers public health.
C) When there is a possibility based on a hypothesis, which may turn out to be flawed, that the product in question might endanger public health but scientific research is contradictory and inconclusive.