A 16-year-old girl is referred for evaluation of tall stature (5 cm above mid-parental height), mild learning disability, and speech delay. Karyotype analysis reveals 47,XXX. On buccal smear cytology, the structure marked **A** (three X chromosomes) results in the formation of multiple inactivated X chromosomes. How many Barr bodies would you expect to observe on buccal smear in this patient?