What implies a lower risk in the treatment group when discussing relative risk?

A lower relative risk implies a lower risk of the outcome in the treatment group compared to the control group. This means that the treatment is associated with a reduced risk of the outcome and may be considered beneficial. Options B, C, and D are incorrect because they either suggest no change or increased risk in the treatment group, which would not imply a lower risk. It is important to note that while a relative risk of less than 1 may indicate a lower risk, the magnitude of the effect should also be taken into account.