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: Pathology
Which of the following is common in all forms of shock? 
Select and explain. 
A. Sepsis, B. Hypovolemia, C. Vasoconstriction, D. Impaired tissue perfusion
D: Impaired tissue perfusion
Answer: D: Impaired tissue perfusion 
Explanation: None