Final answer:
Food handlers must wait 48 hours before coming back to work after having symptoms of FBI (foodborne illness).
Step-by-step explanation:
The correct answer is b) 48 hours.
Food handlers must wait 48 hours before coming back to work after having symptoms of FBI (foodborne illness). This is to ensure that they are no longer contagious and reduce the risk of spreading the illness to others.
During the incubation period, which can range from a few hours to several days, depending on the cause of the foodborne illness, symptoms may not appear immediately after infection. This makes it important for food handlers to stay home and rest if they experience symptoms of FBI.