A 9-year-old female presents for well child care with her parent. She is in the 4th grade, doing well academically, plays soccer on a local team, and reports, “I have 3 best friends”. Health history per parent and child reveals no concerns. On physical exam the clinician's notes the child is at about 40th percentile height and weight for age, and has breast budding and downy, straight, slightly pigmented pubic hair long the labia majora.These physical findings are consistent with:A. Precociou...