You have just finished administering a food/drink questionnaire to ill and non-ill participants in a Minnesota summer picnic party. The ill individuals developed moderate to severe diarrhea 16 to 46 hours after the picnic. Six persons experienced vomiting. The following data were collected:

ATE DID NOT EAT
Number of people Number of peopleFood item Ill Not ill Ill Not illHot dogs 40 30 10 20Hamburgers 32 8 20 40Potato salad 45 25 15 25Ice cream 48 12 2 38Lemonade 20 40 20 20Which food item appears to be the most probable vehicle for the salmonella (agent) infection associated with the illness?A. Hot dogsB. HamburgersC. Potato saladD. Ice creamE. Lemonade