Answer: e. demonstrate that the scientists conducting the trial are not biased in concluding that the drug is effective.
Step-by-step explanation:
The clinical trials are performed in laboratories to determine the effect of drugs or medicines over the animal, plant or human subjects. This is necessary for validating the sale of medicines and drugs on the commercial scale.
The drug companies hire the independent research laboratories to conduct the clinical trials and provide unbiased results. The scientists of the independent laboratories will conduct research which will be fair and free from any kind of biasness to conclude the effectiveness of the drug. Hence, the results can be consider reliable.