Final answer:
The client's statement suggesting that smoking in moderation is acceptable during pregnancy indicates a need for further education, as it is imperative to avoid all tobacco use while pregnant.
Step-by-step explanation:
The statement by the client that indicates further teaching is necessary is: b) I can continue smoking, but just in moderation. During pregnancy, it is crucial for the mother to avoid toxins like tobacco, as smoking can negatively impact fetal development and lead to complications. It is important that the mother takes in adequate nutrients for the fetus and herself, which includes a well-balanced diet, avoiding harmful substances like alcohol and cigarettes, engaging in regular exercise that is appropriate for pregnancy, and attending all scheduled prenatal check-ups to monitor the health and development of both the mother and fetus.