In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups. Over a one-month period, the first group received a low dosage of an experimental drug, the second group received a high dosage of the experimental drug, and the third group received a placebo. The diastolic blood pressure of each participant was measured at the beginning and at the end of the period and the change in blood pressure was recorded. Identify the treatments.

Group of answer choices

Diastolic blood pressure at start, diastolic blood pressure at end

The experimental drug

Placebo, low dosage of drug, high dosage of drug

Low dosage of drug, high dosage of drug

The one-month period