Name the type of research for each of the following and rank them 1-5 (1 strongest, 5 weakest: 5 points).
A. A researcher collects questionnaires from people who exercise and nonexercising people to determine whether there was a difference in physical activity opportunities/access in the past.
B. A researcher systematically reviews all research to determine whether working with a personal trainer increases people’s exercise frequency.
C. A researcher allows one group of mice access to a running wheel in their cage while another group does not have access to a running wheel to see if there are differences in physical activity.
D. A researcher uses adipose cells (adipocytes) from subjects who have exercised to see they if they are less likely to proliferate in 96-well plates than cells from sedentary subjects.
E. A researcher divides subjects into a group who begin working with a personal trainer and a group who continues their normal routine to determine whether working with a personal trainer increases people’s exercise frequency.