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: Ophthalmology
In concussion trauma, damage to ocular structures is caused by: 
Select and explain. 
A. Mechanical tearing of the tissues, B. Disruption of physiological activity by damage to tissue cells, C. Vascular damage leading to ischaemia, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. All of the above