Which of the following factors could lead to a foodborne illness outbreak?

Improper food storage is a significant factor that can lead to foodborne illness outbreaks. When food is not stored at the correct temperature or in the right conditions, it can create an environment conducive to the growth of harmful bacteria, viruses, or parasites. For example, perishable foods that are left out at room temperature for extended periods can develop pathogens that cause illness. Additionally, cross-contamination can occur if raw foods come into contact with ready-to-eat foods due to inadequate storage practices. This makes it critical for food handlers and establishments to adhere to proper food storage guidelines to prevent outbreaks and ensure food safety.

The other factors listed, such as excessive employee training, high food quality standards, and proper waste disposal, contribute positively to food safety practices, rather than posing a risk for foodborne illnesses. Excessive training enhances staff knowledge and skills regarding safety protocols, and high-quality standards ensure the sourcing and handling of food are up to par, while proper waste disposal helps in maintaining a sanitary environment free from pests which can lead to contamination.