Chronic diseases are select one: a. contagious. b. the leading cause of death and disability in the united states. c. inclusive of aids and lyme disease. d. not preventable.

Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs