An 8-Year-Old Boy Is Brought to the Endocrinologist for Testing

An 8-year-old boy is brought to the endocrinologist for testing. He is already as tall as an adult man. His muscles are well developed, and he has little body fat despite eating huge amounts of food. Blood work shows elevated levels of glucose. The endocrinologist should suspect

A) elevated parathyroid hormone levels.
B) elevated testosterone levels.
C) elevated estrogen levels.
D) elevated growth hormone levels.
E) decreased thyroxine levels.