Based on the Precautionary Principle,what Is TRUE

Based on the precautionary principle,what is TRUE?

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