Who defined nursing as utilising the patient's environment to improve their conditions and assist in their recovery?

Correct option is B

Florence Nightingale defined nursing as utilizing the patient's environment to improve their conditions and assist in their recovery. She emphasized the importance of hygiene, fresh air, and a clean environment for the patient's healing process, which became the foundation of modern nursing.
Explanation of options: (a) ✘ Incorrect. Martha Roger is known for her science of unitary human beings, not for the environmental theory. (b) ✔ Correct. Florence Nightingale is known for emphasizing the importance of the environment in nursing care. (c) ✘ Incorrect. Dorothy Johnson developed the behavioral system model of nursing. (d) ✘ Incorrect. Virginia Henderson is known for her definition of nursing focusing on patient independence, not the environment.