As an element of an experiment to test the effectiveness of a drug for depression, one group of participants receives a pill that does not contain any active ingredients. the inclusion of these participants most directly indicates that the experiment involves:

The inclusion of these participants most directly indicates that the experiment involves a control group, and an active drug that they need to compare the results to.

answer; /// (a) and (b) ; /// but i believe the correct answer is ; /apart from fines and jail time, driving under the influence puts the life of the driver and everyone else on the road at risk; (b)

i'll anser so they can have brainliest (my doubleu key is broken)