From the Following, Select the Correct Generalization That Aids in Mounting

From the following, select the correct generalization that aids in mounting radiographs.

A) Posterior films are oriented to give a slight "smile" appearance.
B) The presence of a third root on mandibular molars makes it difficult to view bone in the furcation area.
C) Roots and crowns of mandibular anterior teeth are larger and longer than those of the maxilla.
D) Large, radiolucent areas denoting the nasal fossa or sinus indicate that the image is of the mandibular arch.