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 one of the following statements concerning teeth with furcations is TRUE?

A) The more cervical a furcation, the more stable is the tooth due to more inter-radicular bone
B) Furcation involvement occurs when the attachment level is coronal to the furcation roof
C) Furcations are more cervical on second molars
D) A concavity is found apical to the furcation on the lingual root of the maxillary first molar