OE
The question calls for an explanation of why more cases of reported food poisoning might be attributed to catering services than to restaurants.
Choices A and B both provide reasons why restaurants should account for more cases, so they are incorrect.
Choice C would suggest that there would be negligible differences between the likelihood of food poisoning at restaurants and at catered events, so it also sheds no light on the paradox and is therefore incorrect. Since the argument does not pertain to the location of catered banquets, Choice D is incorrect. That leaves Choice E. People who attend banquets are more likely than restaurant patrons to be part of a group that communicates with one another, so Choice E would help explain the higher number of reported food poisonings and is the correct answer.