A 37-year-old client is admitted to the unit with a differential diagnosis of rule out pheochromocytoma. What are the most common symptoms the nurse would expect this client to exhibit? Excessive sweating and pallorExcessive sweating and pallor Nervousness and periodic severe headacheNervousness and periodic severe headache Variability in blood pressure and weight lossVariability in blood pressure and weight loss Periodic severe headache and marked variability in blood pressurePeriodic severe headache and marked variability in blood pressure