Which of the following is a common symptom of foodborne illness?

Nausea is recognized as a prevalent symptom of foodborne illness due to its direct association with gastrointestinal disturbances often caused by pathogens or toxins present in contaminated food. It indicates that the body is reacting to something harmful that has entered the digestive system.

While fatigue and headache can also occur in the context of foodborne illness, they are typically considered secondary symptoms or related to the overall feeling of malaise that accompanies illness. These symptoms can arise from the body's immune response to an infection or gastric upset, but nausea is more directly linked to foodborne pathogens.

The choice indicating that all mentioned symptoms can manifest together showcases an understanding that foodborne illnesses might not only result in classic gastrointestinal symptoms but can also present with systemic effects, leading to fatigue and headaches as well. This comprehensive perspective on symptoms aligns with the holistic view required when assessing cases of foodborne illness. Therefore, recognizing that nausea is one of the main symptoms, combined with the possibility of experiencing fatigue and headache, substantiates the appropriateness of selecting the option that includes all three symptoms as commonly associated with foodborne illnesses.