Which of the Following Is Characteristic of Erosion

Which of the following is characteristic of erosion?

A) It is a pathologic wearing away of tooth structure that results from a repetitive mechanical habit.
B) It is caused by local factors such as occlusal interferences in combination with stress and tension.
C) If tooth structure is lost around a restoration, the restoration will appear raised from the surrounding demineralized tooth structure.
D) Its first clinical sign is the disappearance of mamelons on the anterior teeth and the flattening of occlusal cusps on the molar teeth.