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An 11-year-old girl accompanied by her parents presents for a follow-up in the clinic to discuss her development. The patient's mother is concerned that her daughter has not begun menstruation because her menstruation started at age 10. On exam, breast budding is occurring and she has a small amount of slightly pigmented pubic hair. The clinician should explain which of the following to her parents:
A) Menarche occurs in Tanner stage 3-4.
B) Menarche typically occurs 4-5 years after thelarche.
C) Puberty is delayed and the patient should see an endocrinologist.
D) The patient is in Tanner stage 1.