Final answer:
A violation of food service safety practices can include improper handwashing, using expired ingredients, and cross-contamination, all of which significantly increase the risk of foodborne diseases.
Step-by-step explanation:
All of the mentioned options would be considered a violation of food service safety practices. Improper handwashing, using expired ingredients, and cross-contamination all contribute significantly to the risk of foodborne diseases. These practices lead to food contamination through different pathways.
Regular handwashing before and after handling food is essential in preventing the spread of contaminants. Likewise, using ingredients before their expiration ensures the food is consumed when it is safe to eat and less likely to harbor harmful bacteria that can cause illness.
Cross-contamination occurs when harmful bacteria or viruses from uncooked foods are transferred to foods that will not be cooked, such as through shared utensils or cutting boards. To safeguard against foodborne diseases, it's imperative to adhere to recommended storage, handling, and preparation guidelines.