During History-Taking, a Client Tells the Nurse That He Is

During history-taking, a client tells the nurse that he is addicted to caffeine and that he drinks 10 to 12 cups of coffee a day as well as several cola drinks and iced tea. The nurse would warn the client that during his NPO status for surgery, he should expect to experience

A) diarrhea.
B) euphoria.
C) headache.
D) itching.