Miss Haversham, a Guest at a Wedding Catered by Giardia's

Multiple Choice

Miss Haversham, a guest at a wedding catered by Giardia's Fine Foods, became violently ill, as did several other guests. It was later found that only those who ate the crab salad appetizer became ill. Since Miss Haversham is not able to prove how she was injured by Giardia's but only that she was injured, presumably by them, which of the following concepts could she use to help her establish Giardia's negligence?

A) Agony of the moment
B) Volenti non fit injuria
C) Res ipsa loquitur
D) The doctrine of last clear chance
E) Vicarious liability