What Are the Concepts of Florence Nightingale's Nursing Theory That

What are the concepts of Florence Nightingale's nursing theory that are still in practice today?

A) Nature alone cures. Nursing assists the person to an improved condition for nature to take its course.
B) Mind and body are one. Nursing's role is to assist clients to perform functions they would perform unaided if they had the necessary strength, will, or knowledge.
C) Building on Maslow's Hierarchy of Needs, nursing assists clients to meet self-care needs necessary to maintain life, health, and well-being.
D) An individual's state of health/illness moves back and forth on a continuum.