The student nurse is constructing a presentation on evidence-based practice. Which statement should be included in the introduction about evidence-based practice? 1) Evidence-based practice is a method of making healthcare decisions based on the best available evidence. 2) Evidence-based practice is a theory that has not been proven effective in healthcare. 3) Evidence-based practice is only applicable to certain healthcare professions. 4) Evidence-based practice is a new concept that is not widely accepted in the healthcare field.