--What did the teacher say just now?

--- The teacher told us _______ our hands before ______ the questions.

A．to rise; answered

B．rise; answering

C．to raise; answering

D．raise; answered

男性，39 岁，半年多来向心性肥胖，皮肤色素沉着加深。化验检查：血浆皮质醇(8AM)1650nmol/L (正常值165～441nmol/L)，血浆ACTH 146μU/ml(正常值0～46/μU/ml)，血pH 7.46，血钾3.0mmol/l，CT 示双侧肾上腺增生。最可能的诊断是（）

A．原发性醛固酮增多症

B．双侧肾上腺增生

C．肾上腺皮质腺瘤

D．肾上腺皮质癌

E．Cushing 病