15. if a client's knees hurt after a one-week walking regimen, which one of the following suggestions is most appropriate? a. switch to anaerobic exercise. b. wear different shoes. c. jog in a swimming pool. d. take a week's rest from exercise.

Which of these gives the best indication that a health service is based on pseudoscience? a. the service is not controversial and is supervised by medical professionals. b. the service has been extensively researched, has a high success rate, and is expensive c. the service is inexpensive, is based on research, and has been around for a long time d. the service has not been researched and is expensive