Final answer:
It is not safe to serve a salami and cheese sandwich that has been out of refrigeration from 5:00 am to 11:30 am due to the risk of bacteria growth in the 'Danger Zone' temperatures. The correct option is B) No, it's not safe.
Step-by-step explanation:
No, it's not safe to serve a salami and cheese sandwich that has been displayed without refrigeration from 5:00 am to 11:30 am. According to food safety guidelines, perishable foods, which include items like meats and cheeses, should not be left out at room temperature for more than two hours. This period shortens to just one hour if the ambient temperature is above 90 degrees Fahrenheit (approximately 32 degrees Celsius). The reason is, that the temperature range between 40 and 140 degrees Fahrenheit (4 and 60 degrees Celsius) is known as the 'Danger Zone' where bacteria can multiply rapidly, increasing the risk of foodborne illness.
Foods meant to be eaten cold should be kept refrigerated to minimize this risk. For instance, items such as sliced meats, which are not cooked again before serving, are particularly susceptible to bacterial growth. Thus, it is crucial to store such perishables at the right temperature until they are ready to be served. Furthermore, factors like the type of cheese or ambient temperature do not change the two-hour safety limit notably enough to make it safe.
The correct option is B) No, it's not safe.