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
TSS (Toxic Shock Syndrome) is caused mainly by: 
Select and explain. 
A. Streptococci, B. Staphylococci, C. Pneumococci, D. Pseudomonas
B: Staphylococci
Answer: B: Staphylococci 
Explanation: Staphylococci