Which one of the following, if true, would most strengthen an argument of the opponents of rDNA technology? A. Agricultural products developed through rDNA technology are no more attractive to consumers than are traditional crops. B. Genetically altered microorganisms have no natural predators but can prey on a wide variety of other microorganisms. C. Drugs produced using rDNA technology cost more to manufacture than drugs produced with traditional technologies. D. Ecosystems are impermanent systems that are often liable to collapse, and occasionally do so. E. Genetically altered microorganisms generally cannot survive for more than a few hours in the natural environment.