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
What could be the most appropriate provisional diagnosis for multiple nodular exophytic reddish lesions of oral mucosa in an AIDS patient? 
Select and explain. 
A. Hemangioma, B. Focal epithelial hyperplasia, C. Acute pseudo-membranous candidiasis, D. Kaposi's sarcoma
D: Kaposi's sarcoma
Answer: D: Kaposi's sarcoma 
Explanation: None