This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
The 40-year-old woman shown below complains of weakness and amenorrhea. She has hypertension and diabetes mellitus. The clinical findings may be explained by 
Select and explain. 
A. Pituitary tumor, B. Adrenal tumor, C. Ectopic ACTH production, D. Any of the above
D: Any of the above
Answer: D: Any of the above 
Explanation: (d) Source: (Braunwald, 15/e, pp 2091-2093.) The clinical findings all suggest an excess production of cortisol by the adrenal gland. Hypertension, truncal obesity, and abdominal striae are common physical findings. The process responsible for continued excess could be any of those listed--an ACTH-secreting pituitary tumor, an ectopic ACTH-producing neoplasm, or a primary adrenal tumor.