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
Cavernous sinus thrombosis can occur due to spread of odontogenic infection via: 
Select and explain. 
A. Tissue spaces, B. Lymphatic route, C. Hematogenous route, D. All of the above
C: Hematogenous route
Answer: C: Hematogenous route 
Explanation: None