A cook prepares sandwitches for ten people going for picnic.Eight out of them develop severe gastroenteritis within 4-6 hours of consumption of the sandwitches.It is likely than on investigations the cook is found to be the carrier of:

• A. Salmonella typhi
• B. Vibrio cholerae
• C. Entamoeba histolytica
• D. Staphylococcus aureus