Final answer:
Clinical practice guidelines are designed to provide evidence-based plans for managing clinical problems, lower healthcare costs, and improve patient outcomes; hence, the comprehensive purpose is 'all of the above.'
Step-by-step explanation:
The purpose of clinical practice guidelines is multifaceted. Primarily, they are designed to provide a plan to manage clinical problems based on the best available evidence or expert consensus. This plan aims to standardize care, reflecting the best understanding of the medical science at hand. Additionally, guidelines strive to lower healthcare costs by avoiding unnecessary or ineffective treatments and streamlining care processes. Most importantly, they aim to improve patient outcomes by ensuring that all patients receive the most effective and appropriate care for their conditions. Therefore, the correct answer to the purpose of clinical practice guidelines would be 'all of the above.'