Which Is TRUE About the Precautionary Principle

Which is TRUE about the precautionary principle?

A) Regulators make educated guesses about safety based on how other similar compounds have fared.
B) Toxic products are often discovered only after reaching the marketplace.
C) Typically, many consumers are harmed by chemicals reaching consumers.
D) Products are recalled after they are shown to be harming consumers.
E) Harmful products are prevented from reaching store shelves.