A Police Officer Has Arrested a Man for Assault

A police officer has arrested a man for assault. The arrestee is carrying a backpack. During an immediate search of the person incident to the arrest, how should the officer treat the backpack?

A) the officer may search the backpack only with a warrant.
B) the officer may search the backpack without a warrant but only if the officer has additional justification that the backpack contains a weapon.
C) The officer may search the backpack without a warrant or additional justification.
D) The officer may not search the backpack.