Final answer:
The onset of food-borne intoxication illness due to toxins such as those from Staphylococcus aureus can occur within 1 to 6 hours, making the correct answer option A) 2-4 hours.
Step-by-step explanation:
The onset of symptoms for food-borne intoxication, commonly known as food poisoning, can occur within various time frames depending on the causative agent. For certain toxins, like those produced by Staphylococcus aureus, symptoms such as nausea, vomiting, and diarrhea can develop rapidly, typically within 1 to 6 hours after consumption of contaminated food. Therefore, the correct answer to the question of how many hours the onset of food-borne intoxication illness can occur is option A) 2-4 hours. However, it is important to note that other foodborne illnesses caused by different bacteria or viruses may have different incubation periods.