A group of medical researchers recently tested the effects of a cholesterol-lowering medication, Drug A, on men who had high blood levels of cholesterol. The researchers did the following experiment and obtained the indicated results. One group of 150 men took a tablet containing 40 mg of Drug A for 90 days; 120 men in this group decreased their blood levels of cholesterol by at least 10 %. Another group of 150 men was given a tablet with no added Drug A for 90 days; 25 of these men decreased their blood levels of cholesterol by at least 10%. Which of the following is the most reasonable and accurate conclusion based onresults obtained in this experiment?
A. Drug A is good for men
B. Drug A is found in the blood of men
C. men taking tablets with Drug A will show a decrease in cholesterol levels in the blood
D. men taking tablets with Drug A will show an increase in cholesterol levels in the blood
E. blood levels of cholesterol are not affected by taking tablets of Drug A