Vignette #1 the Waltons Have Dinner at Their Favorite Local

Vignette #1 The Waltons have dinner at their favorite local restaurant. Marty has a hamburger, Jill has grilled chicken, and Lori has clams on spaghetti. They have wine with dinner, order dessert, and thoroughly enjoy the evening. Late the next day, Marty starts having stomach pains. Soon, he also has diarrhea and begins vomiting. Jill decides he should go to the emergency room at the hospital. The medical intern at the ER sees Marty in extreme pain and immediately begins asking him questions. If you were the intern, how would you answer the following questions?
The hamburger was most likely the culprit in Marty's illness. What may have occurred to lead to his condition?

A) The cows may have been given feed containing mammalian protein tissues.
B) The meat was stored in a refrigerator at 38 degrees Fahrenheit for more than one day.
C) The meat was only cooked to 150 degrees Fahrenheit.
D) The meat was defrosted in the refrigerator.
E) The meat may have been left at room temperature for 15 minutes before cooking.