Final answer:
In the event of a foodborne illness complaint, a restaurant manager should express concern and complete an incident report to document the situation. The correct answer is option b.
Step-by-step explanation:
When a guest reports a foodborne illness they believe came from a restaurant, the manager should first express concern for the guest's well-being. It's important to take such complaints seriously, both for the health of the customers and for the reputation and legal standing of the restaurant.
An essential aspect of handling this situation is gathering information without admitting responsibility prematurely, as the cause of the illness might not be related to the restaurant. Conducting a case-control study can help determine if a particular food item is associated with the illnesses.
The next step would involve completing a foodborne illness incident report. If food samples from the restaurant test negative for harmful bacteria, further investigation into other potential causes, including personal hygiene practices of the customers or employees, would be needed.