Many Drugs Marketed in the 1980s May Not Be Effective

Many drugs marketed in the 1980s may not be effective in a majority of the population.The nurse understands that this is because these drugs

A) did not pass through the appropriate phases of clinical trials.
B) did not require human subject protections and are invalid.
C) were not tested on women, minorities, or children.
D) were tested on healthy subjects only.