Which of the Following General Statements About the Root of a Single-Rooted

Which of the following general statements about the root of a single-rooted tooth is correct?

A) From a facial or lingual view,an imaginary midline of the root has a slight distal inclination to an imaginary midline of the crown.
B) From a facial or lingual view,proximal surfaces diverge apically.
C) From an incisal or occlusal view,proximal surfaces diverge toward the lingual.
D) From an incisal view of a horizontal cervical cross-section,the shape is round in contour.