During a Health History the Nurse Plans to Assess the Functioning

During a health history the nurse plans to assess the functioning of a patient's central nervous system (CNS) . Which question should the nurse ask to assess this function?

A) "Do you get dizzy when moving from a sitting to standing position?"
B) "Do you have difficulty adjusting to changes in temperature?"
C) "Do you have difficulty falling asleep in the evening?"
D) "Have you had any weight loss?"