A police officer has probable cause to arrest Sam, a man who is carrying a backpack. What may the officer search, incident to a lawful arrest in this situation?
A. The officer may thoroughly search Sam and his backpack.
B. The officer may thoroughly search Sam, but not his backpack.
C. The officer may search Sam by patting him down over his outer layer of clothing for the sole purpose of locating weapons, but under no circumstances may the officer search his backpack.
D. The officer may not search Sam without a warrant or consent.