780 Participants Suffering from Depression Were Randomly Assigned to One

Multiple Choice

780 participants suffering from depression were randomly assigned to one of three groups.Over a four-month period,the first group received a low dosage of an experimental drug,the second group received a high dosage of the drug,and the third group received a placebo.At the end of the period each participant rated their mood on a scale of 1-5.Identify the treatments.

A) The experimental drug,mood
B) Placebo,low dosage,high dosage
C) The dosage of the drug
D) Mood level 1,mood level 2,mood level 3,mood level 4,mood level 5
E) The experimental drug