. Which of the following is an example of an epidemiological experiment? a. To test the…

. Which of the following is an example
of an epidemiological experiment?

a. To test the effectiveness of a
drug, researchers administer it to an experimental group of subjects but not to
a control group of subjects. b. Researchers look at the pattern of cancer
development across populations in New England. c. Researchers conduct a
clinical trial to determine whether a treatment for multiple sclerosis is
effective. d. Researchers conduct a double-blind study to determine whether
fish oil supplements reduce the frequency of heart attacks.