Which of the Following Best Fits with the Precautionary Principle

Multiple Choice

Which of the following best fits with the precautionary principle?

A) Always take precautionary measures when objective risk cannot be assessed.
B) Precautionary measures are to be taken even when objective risk can be assessed.
C) Where there are threats of serious or irreversible damage, lack of full scientific certainty should not to be used to postpone cost-effective preventive measures.
D) None of the above.