What is the most likely cause of large outbreaks of food poisoning?

A.) genetic modification of the food
B.) overuse of antibiotics on factory farms
C.) runoff of human-made fertilizers into surface waters
D.) unsanitary conditions on the farms where the food originated

If the skin preparation site contains a colostomy or draining sinus that cannot be sealed off, how should that area be prepped? a. last, with sponges to be used once and discarded b. first, with the same preparation tray c. simultaneously, with the same preparation tray d. first, with a separate preparation tray