
Passage: A doctor gave a group of prostate tumor patients waiting for surgery a capsule made of lycopene he extracted from tomatoes, 15 mg twice a day.Three weeks later, it was found that the tumors in this group were significantly reduced, and some of them were almost eliminated. the doctor speculated that lycopene had the effect of reducing prostate tumors.
Question: Which of the following options, if correct, can best support the doctor's conclusion?
A. A.Patients with prostate tumors taking lycopene are between 45 and 65 years old
B. B.A small number of patients with prostate tumors taking lycopene are seriously ill
C. C.There is also a similar group of prostate tumor patients waiting for surgery who did not take lycopene capsules and their tumors did not shrink
D. D.Lycopene exists not only in tomatoes but also in watermelons, grapes and other fruits
Answer: