A new drug is developed. The drug has many side$-$effects $($erectile dysfunction, diarrhea, head$-$aches, etc.$).$ The study provides participants with financial compensation for their participation. A large number of low$-$income individuals enroll in the study. However, once the drug receives FDA approval, the drug company makes the price very expensive. Therefore the drug is primarily used by high$-$income patients. This demonstrates a violation of

Group of answer choices

the principle of justice

the principle of respect for persons

the principle of beneficence