61. A 50-year-old male visited outpatient clinic due to difficult-to-control hypertension. After initial work up, hypokalemic hypertensive disorder was impressed, Further laboratory evaluation of adrenal hormones including plasma renin, aldosterone, cortisol, and androgen levels were arranged to distinguish among specific diagnoses. The results are: high renin level, high aldosterone level, an aldosterone-to-renin ratio of 10 : 1 ； and a normal serum cortisol level Which is the most possible diagnosis? (A) ACTH-secreting tumor。 (B) Bartter syndrome。 (C) Liddle syndrome。 (D) Primary hyperaldosteronism。 (E) Unilateral renal artery stenosis。