During Patient Testing, a Nurse Administers Cosyntropin (Cortrosyn)to a Patient

During patient testing, a nurse administers cosyntropin (Cortrosyn) to a patient.If plasma cortisol levels fail to rise after an injection of cosyntropin, the pathology is:

A) At the level of the pituitary or hypothalamus (secondary adrenocortical insufficiency) .
B) Caused by cosyntropin (Cortrosyn) .
C) Idiopathic in nature.
D) At the level of the adrenal gland (primary adrenocortical insufficiency) .