Statutory law consists of laws written and enacted by the U.S. Congress, the state legislatures, and other governmental entities such as cities, counties, and townships.

An individual who is responsible for his or her health care: While client responsibility is a concept in healthcare, it is not the primary focus of Johnson's Behavioral System Model. The model primarily focuses on the client as a dynamic system.

A behavioral system that is an integrated whole: This statement is partly correct; however, it doesn't fully capture the essence of Johnson's model. Johnson does focus on behavioral systems, but the model is more comprehensive, considering the client as a dynamic entity with inputs, processes, and outputs.

A dynamic entity with both input and output: This accurately reflects the essence of Johnson's Behavioral System Model. In this model, the client is seen as a dynamic system that processes inputs (stimuli from the internal and external environment) and produces outputs (responses or behaviors). The interactions between these inputs and outputs determine the client's adaptation and overall health.

An individual who must adapt to illness: While adaptation is a central concept in Johnson's model, it doesn't solely focus on illness adaptation. It encompasses a broader view of the individual's behavioral responses to various stimuli and stressors in both health and illness contexts.

A) Restore the client's system to an optimal state of balance:
This statement is not accurate for tertiary intervention. Tertiary intervention primarily focuses on managing and preventing complications or disabilities resulting from an illness or condition. It does not necessarily aim to restore the client's system to an optimal state of balance, as that is more aligned with primary and secondary prevention strategies.

B) Treating symptoms that stressors have already produced:
This statement is correct. Tertiary intervention aims to address and manage the symptoms, disabilities, or complications that have resulted from stressors or illnesses. It focuses on providing appropriate treatments, rehabilitation, and support to improve the client's quality of life and prevent further complications.

C) Preventing symptoms caused by environmental stressors:
This statement is not accurate for tertiary intervention. Tertiary intervention deals with managing existing symptoms or complications rather than preventing new symptoms caused by environmental stressors.

D) Teaching cultural perspectives of environmental stressors:
This statement is not directly related to tertiary intervention. Tertiary intervention focuses on providing medical treatments, therapies, and support to individuals with existing conditions, rather than teaching cultural perspectives.