Cross-contact is most likely.to occur when drainage pipes are not separated by a backflow device. raw beef and raw poultry are prepped together on the same surface. different types of food are cooked in the same fryer oil. sauces are made with stocks made from scratch

## Step 1<br />Cross-contact refers to the unintentional transfer of allergens from one food item to another. This can occur when allergens are present in the cooking environment or equipment.<br /><br />## Step 2<br />The first option, "drainage pipes are not separated by a backflow device", is related to plumbing and does not directly relate to cross-contact in food preparation.<br /><br />## Step 3<br />The second option, "raw beef and raw poultry are prepped together on the same surface", is the most likely scenario for cross-contact. When raw meats are prepared on the same surface without proper cleaning in between, there's a high risk of allergens from one meat contaminating another.<br /><br />## Step 4<br />The third option, "different types of food are cooked in the same fryer oil", can lead to flavor contamination, but it doesn't necessarily result in cross-contact unless one of the foods contains an allergen that contaminates another.<br /><br />## Step 5<br />The fourth option, "sauces are made with stocks made from scratch", does not inherently lead to cross-contact unless the stocks contain allergens that are then transferred to other dishes.