A 70-Year-Old Woman Tells the Nurse That Every Time She

A 70-year-old woman tells the nurse that every time she gets up in the morning or after she's been sitting,she gets "really dizzy" and feels like she is going to "fall over." The nurse's best response would be:

A) "Have you been extremely tired lately?"
B) "You probably just need to drink more liquids."
C) "I'll refer you for a complete neurological examination."
D) "You need to get up slowly when you've been lying or sitting."