Answer:
D. The drug is ineffective.
Step-by-step explanation:
FDA is the acronym for Food and Drug Administration. FDA is a United States government agency, established in 1862, with the function of controlling food and medicine. This institution promotes the supervision of research, manipulation and efficiency of drugs, and establishes guidelines and tests to decide whether the drug can be marketed or not. One factor that may cause the FDA to hinder the marketing of the drug is the ineffectiveness of the drug.