At 32 Weeks' Gestation, a Woman Is Scheduled for a Second

At 32 weeks' gestation, a woman is scheduled for a second nonstress test (following the one she had at 28 weeks' gestation) . Which response by the patient would indicate an adequate understanding of this procedure?

A) "I can't get up and walk around during the test."
B) "I'll have an IV started before the test."
C) "I must avoid drinks containing caffeine for 24 hours before the test."
D) "I need to have a full bladder for this test."