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: Microbiology
Which of the following is not a rapidly growing atypical mycobacteria causing lung infections - 
Select and explain. 
A. M. chelonae, B. M.fortuitum, C. M.abscessus, D. M.kansasii
D: M.kansasii
Answer: D: M.kansasii 
Explanation: None