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: Surgery
Which of the following is the best method to assess the adequacy of replacement : 
Select and explain. 
A. Decrease in thirst, B. Increase in urine output, C. Blood pressure, D. Increased PaO2
B: Increase in urine output
Answer: B: Increase in urine output 
Explanation: None