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: Medicine
Bad prognostic factors in Lupus Nephritis - 
Select and explain. 
A. Anti-ds DNA, B. Hypocomplementemia, C. Persistent proteinuria (>3gm/day), D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None