This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which hormone, together with the catecholamines, enhances the tone of vascular smooth muscle and assists in elevating blood pressure? 
Select and explain. 
A. Parathyroid hormone, B. Glucagon, C. Thyroxine, D. Cortisol
D: Cortisol
Answer: D: Cortisol 
Explanation: None