Answer:
Beneficence
Explanation:
The Belmont report is one of the leading works concerning ethics in health care research.
It has three Basic ethic principles
Beneficence is an act of mercy. It is required that the persons be treated in a manner that will minimize risks therefore protecting their mental, physical and mental well-being.
Since it was found that the drug has positive effects, the control group should be given an opportunity to receive the new drug.