A patient's laboratory data reveal an elevated thyroxine (T4) level. What gland should the nurse assess?

A. Adrenal: The adrenal glands produce hormones like cortisol and adrenaline, but not thyroxine. B. Parotid: The parotid glands are salivary glands and are unrelated to thyroxine production. C. Thyroid: The thyroid gland produces thyroxine (T4), and elevated levels of this hormone indicate that the thyroid gland should be assessed for potential hyperthyroidism. D. Parathyroid: The parathyroid glands regulate calcium levels but do not produce thyroxine.