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
Syphilitic arterial aneursysms typically involve which of the following processes? 
Select and explain. 
A. Cystic medial sclerosis, B. Fatty streaks, C. Circumferential calcification, D. Endarteritis of the vasa vasorum
D: Endarteritis of the vasa vasorum
Answer: D: Endarteritis of the vasa vasorum 
Explanation: None