A nurse is reinforcing teaching with a client who is at 8 weeks of gestation. Which of the following responses by the client indicates an understanding of the teaching?
A) "I should avoid lifting heavy objects during my pregnancy."
B) "I can indulge in as much caffeine as I want; it won't affect the baby yet."
C) "I don't need to take any prenatal vitamins until I'm further along."
D) "It's okay for me to continue smoking since the baby is still small."