While Visiting Your Friend Who Recently Gave Birth, She Comments

While visiting your friend who recently gave birth, she comments on her infant's soft spot. You think to yourself that the correct term for the "soft spot" located at the intersection of the frontal, sagittal, and coronal sutures is

A) mastoid fontanel.
B) cushion spot.
C) sphenoidal fontanel.
D) occipital fontanel.
E) anterior fontanel.