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
Streptococcus mutans is considered to be a principal etiologic agent of caries because it produces organic acids and it: 
Select and explain. 
A. Forms a gelatinous matrix, B. bMetabolizes substrate from saliva, C. Derives energy from enamel constituents, D. Lives symbiotically with lactobacillus
A: Forms a gelatinous matrix
Answer: A: Forms a gelatinous matrix 
Explanation: None