A Nurse Teaches a Client Who Is Scheduled for a Positron

A nurse teaches a client who is scheduled for a positron emission tomography scan of the brain.Which statement should the nurse include in this client's teaching?

A) "Avoid caffeine-containing substances for 12 hours before the test."
B) "Drink at least 3 liters of fluid during the first 24 hours after the test."
C) "Do not take your cardiac medication the morning of the test."
D) "Remove your dentures and any metal before the test begins."