The Bones in the Skull Have Many Different Names but What

Multiple Choice

The bones in the skull have many different names but what are the boundaries of each bone? Where do they start and stop?

A) Bones of the skull are separated by immobile joints called sutures.
B) Boundaries for skull bones are seen only in the infant skull.
C) The boundaries are indistinct and are simply vague generalized regions.
D) Bones of the skull are continuous but named for their specific markings.