Community psychologists are specialists who: choose the correct answer from the following choices, and then select the submit answer button.

a. companies with personnel, management structure, leadership style, and work environment.
b. study eating, exercise, harmful substances, sexual behavior, and sexually transmitted diseases.
c. conduct experiments on a wide variety of species mirroring the topics studied in humans.
d. often participate in large-scale efforts to empower people and enhance their lives through prevention.