Which of the following accurately describe mandibular molars (Select all that apply. )?

A) Crowns are wider mesiodistally than faciolingually.
B) Three roots are present: two facial and one lingual.
C) The mandibular second molar has a cusp of Carabelli.
D) The occlusal groove on the second molar is well established.
E) A strong oblique ridge is present on the first molar.