Answer:
D) ask for some identification​
Explanation:
"Health Inspections" are being conducted by the local health departments in order to ensure that your restaurant is following the standard protocol when it comes to food handling and food preparation. In order to get a high score, one has to know the common health code violations which includes the following: improper storage of food, poor sanitation in the kitchen, cross contamination and the like.
Once the inspector arrives in your establishment, it is important to ask for some identification. You only contact the health regulatory agency if you're doubtful about the said inspection or you want to verify it further. Some people are actually scammers and not inspectors. However, you shouldn't delay the inspection because it might cause the inspector to get moody upon returning with the inspection warrant.