Evidence-based practice refers to: (Multiple Choice)

Evidence-based practice refers to:
 
  a. the requirement that clinicians provide evidence to insurance companies that the problem they are treating has both psychological and biological causes.
  b. employing only those treatments or interventions that have been shown to be effective.
  c. the requirement that clinicians provide evidence that they have been practicing their clinical skills for the required hours before having their own clients without supervision.
  d. the requirement by HIPPA that all clinicians must provide evidence of having the required degree in their particular state to practice as a health psychologist.