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
Which of the following is the leading cause of death in brucellosis? 
Select and explain. 
A. Mycotic aneurysms, B. Suppurative abscesses, C. Pneumonia, D. Endocarditis
D: Endocarditis
Answer: D: Endocarditis 
Explanation: Endocarditic is the leading cause of death in brucellosis, although the outcome of Brucella endocarditis has been more orable in recent years because of advances in early diagnosis, antibiotic treatment, and cardiac surgery.