Use Case B to Answer the Following Questions

Use Case B to answer The Following questions
CASE BPermanent Dentition
An adult female client new to the dental practice expresses an interest in orthodontic treatment. The client has a moderate caries risk and a tongue thrust swallowing pattern. Three carious lesions on the proximal surfaces are recorded during the dental examination, and the client admits that she does not floss. She informs the hygienist that she has "a sore spot on the left side of her mouth" that hurts when she eats. Use Case B and Figures 5-29 and 5-30 to answer questions 13-20.
-Which of the following statements about tooth form characteristics is true?

A) Distal cusp ridges are shorter than mesial cusp ridges
B) The facial crest of curvature is located in the middle third on posterior teeth
C) The proximal crests of curvature are located in the cervical third of all crowns
D) Ideally, the proximal crest of curvature is also the contact area