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
The most potent stimulator of native T-cell is: 
Select and explain. 
A. Follicular dendrite cells, B. Mature dendrite cells, C. Epithelial cells, D. Macrophage
B: Mature dendrite cells
Answer: B: Mature dendrite cells 
Explanation: None