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: Dental
Actinobacillus actinomycetam comitans is 
Select and explain. 
A. Gram positive aerobe, B. Gram negative aerobe, C. Obligate anaerobe, D. Facultative anaerobe
D: Facultative anaerobe
Answer: D: Facultative anaerobe 
Explanation: None