A 25 year old young woman has recurrent episodes of headache and sweating.Her mother had renal calculi and died after having a neck mass.The physical examination reveals a thyroid nodule but no clinical sign of thyrotoxicosis.Before performing thyroid surgery,the surgeon should order:

• A. Measurement of thyroid hormones
• B. Serial determinations of serum calcium,phosphorus protein and alkaline phosphatase
• C. 24-hrs urine test for 5 hydroxyindoleacetic acid excretion.
• D. Serial 24-hrs test for catecholamines,metanephrines and vanillylamandelic acid excretion.