The Family Member of a Patient Who Is in Adrenal

The family member of a patient who is in adrenal crisis asks why the IV cortisone is continued after the initial IV push of Solu-Cortef,which seemed to stop the symptoms.The nurse replies that:

A) Solu-Cortef has a very brief therapeutic period and needs a maintenance IV infusion to keep up the level.
B) IV infusions guarantee that Solu-Cortef will be absorbed.
C) Long-term IV infusions maintain adequate urine output.
D) IV cortisone supports peripheral perfusion and elevates the blood pressure.