This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Microbiology
A cook prepares sandwiches for 10 people going for a picnic. Eight out of them develop severe gastroenteritis within 4-6 hrs of consumption of the sandwiches. It is likely that on investigation the cook is found to be the carrier of 
Select and explain. 
A. Salmonella typhi, B. Vibrio cholerae, C. Entamoeba histolytica, D. Staphylococcus aureus
D: Staphylococcus aureus
Answer: D: Staphylococcus aureus 
Explanation: Staphylococcus aureus produces toxins that can act as food poisons. Ref: Ananthanarayan and Paniker&;s Textbook of Microbiology, 9th edition; pg no: 207