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: Medicine
All of the following components or qualities of stored whole blood tend to decrease over time except: 
Select and explain. 
A. Red blood cell viability, B. Potassium concentration, C. PH, D. Platelet activity
B: Potassium concentration
Answer: B: Potassium concentration 
Explanation: None