A Nurse Is Preparing a Patient for a Vital Sign

A nurse is preparing a patient for a vital sign assessment. Which of the following questions should the nurse ask prior to taking the vital signs?

A) "Have you eaten any salty foods today?"
B) "Do you have any allergies, and if so, what type of reaction?"
C) "Have you had any caffeine or smoked in the past 30 minutes?"
D) "Have you exercised today?"