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
Pathological changes occur in dengue haemorrhagic  Fever ( DHF): 
Select and explain. 
A. Focal haemorrhages and congestion., B. Coagulopathy with thrombocytopenia., C. Haemoconcentration., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: PATHOLOGIC CHANGES The predominant organ Changes in DHF are due to:

Focal haemorrhages and congestion;
Increased vascular permeability resulting in oedema in different organs;
Coagulopathy with thrombocytopenia; and
Haemoconcentration.