A Client with a New Diagnosis of an Endocrine Disorder

A client with a new diagnosis of an endocrine disorder is unclear how the body can control the levels of different hormones over time. Which of the following statements most accurately underlies the dominant regulation process of hormone levels in the body?

A) A positive feedback cycle ensures that stable levels of hormones exist in the body over time.
B) With input from various sensors, hormone production and release are adjusted based on existing hormone levels.
C) The hypothalamus ensures that hormone levels correspond accurately to the diurnal cycle.
D) The pituitary gland is genetically programmed to stimulate and inhibit hormone production and/or release based on the needs at different points in the life cycle.