单项选择题During the conduct of a large clinical trial of an investigational drug, preliminary analysis of results show that there were three times as many participants in the experimental group who experienced severe nausea and vomiting compared to the control group. Two of the cases were severe enough to require that the participants be hospitalized. This is despite the fact that the preliminary analysis shows that there may be a moderate benefit with the drug. What should be done?
单项选择题决策的原则是最优原则。