(09.06)
A study of a new medication found that patients who took the medicine have reduced blood
pressure, compared to those who did not take the medicine. The research team concluded
that the medicine caused the reduction in blood pressure. Which study design did they most
likely use? (2 points)

A.) They most likely used an experiment with patients randomly assigned to take the medicine or not take
the medicine.

B.) They most likely used an experiment with patients randomly assigned to groups based on their blood
pressure.

C.) They most likely used a survey asking patients if they took the medicine and how their blood pressure
was affected.

D.) They most likely used a survey asking patients if they took the medicine and if they felt the medication
helped their blood pressure.