Situation: Jenny, 43 Years Old, Has Consulted Her Family Physician

Situation: Jenny, 43 years old, has consulted her family physician because she has been experiencing chest pains, intolerance to heat, nervousness, dizziness, frequent headaches, and palpitations during the past three months. The doctor diagnosed her with pheochromocytoma. The most important assessment that the nurse should carry out with regards to Jenny's condition is:

A) Urine output
B) Blood pressure
C) Respiratory rate
D) Temperature