The superior and middle nasal concha of the ethmoid ________.

A) are perforated by foramina that allow passage of the branches of the olfactory nerves
B) provide additional time for warming, humidifying, and dust removal before incoming air reaches more delicate portions of the respiratory tract
C) form part of the nasal septum, a partition that also includes the vomer and a piece of hyaline cartilage
D) separate the right and left sides of the cribriform plate
E) stabilize the position of the brain