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

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.If Miss Haversham were to sue for negligence,she would normally have to prove

A) that Giardia's was strictly liable for her injuries
B) that Giardia's failure to live up to the duty of care that it owed to her led directly to her injuries.
C) that Giardia's had a duty of care,which it failed by its actions,to serve her food that was fit to eat.
D) Both b and c.
E) Both b and c and another element not mentioned above.