in an experiment designed to test germ theory, dr. e. l. trudeau used three groups of five rabbits each as study organisms. in the first group, dr. trudeau infected the rabbits with tuberculosis and placed them into a dark, damp environment for four months and fed them only poor-quality food. the rabbits in the second group were also placed into a dark, damp environment and fed only poor-quality food but were not infected with tuberculosis. the rabbits of the third group were infected with tuberculosis and placed in a sunny, open environment with access to good quality food. after four months, dr. trudeau counted the number of rabbits in each group that survived