A cook prepared sandwiches for 10 people going for picnic. Eight out of them develop sever gastroenteritis within 4-6 hrs of consumption of the sandwiches. It is likely that on study the cook is found to be carrier of:

(A) Salmonella typhi
(B) Entamoeba histolytica
(C) Vibrio cholerae
(D) Staphylococcus aureus