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: Anaesthesia
Best way to prevent hypotension during spinal anesthesia 
Select and explain. 
A. Preloading with crystalloids, B. Mephentermine, C. Dopamine, D. Tredelenbug's position
A: Preloading with crystalloids
Answer: A: Preloading with crystalloids 
Explanation: A i.e. Preloading with crystalloids