A Researcher Wants to Investigate the Effectiveness of a Cholesterol-Lowering

A researcher wants to investigate the effectiveness of a cholesterol-lowering medication.The 450 participants are first divided into two groups - those suffering from diabetes and those not suffering from diabetes.Within each group the participants are randomly assigned to one of three groups.The first group will receive a low dose of the medication,the second group will receive a high dose of the medication,and the third group will receive a placebo.At the end of a six-month period,each person's cholesterol will be tested and the change in their cholesterol level will be recorded.The experiment is double blind.Within the group suffering from diabetes,those taking a high dose of the medication showed a marked decrease in their cholesterol level.Determine the nature and scope of the conclusion the experiment can reach.

A) Since the technicians administering the treatment could have been biased,no conclusion can be reached.
B) Since the physicians evaluating the results could have been biased,no conclusion can be reached.
C) A high dose of the medication may decrease cholesterol levels.
D) For people suffering from diabetes,a high dose of the medication may decrease cholesterol levels.
E) People suffering from diabetes may experience a decrease in cholesterol levels.