You are answering a USMLE-style medical question. Question: A 17-year-old girl is brought to the pediatrician by her father for evaluation. He is concerned that she has not undergone puberty yet, while all of her classmates at school have. The patient herself feels well overall, with no specific complaints. Examination shows vital signs of T 98.9, HR 71, and BP 137/92. The physician notes undeveloped breasts and normal external and internal female genitalia in Tanner I stage of development. Her body mass index is within normal limits, she is in the 40th percentile for height, and she is agreeable and pleasant during the interview. Which of the following additional findings is likely present in this patient? Options: A) Aromatase enzyme deficiency B) Hypokalemia C) XY karyotype D) Hypercortisolism Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.