Final answer:
The statement indicating the need for further teaching is the one about resuming regular exercise immediately, which is not recommended after a Cesarean delivery.
Step-by-step explanation:
The statement by the client that indicates the need for further teaching is: "I can resume my regular exercise routine immediately." After a Cesarean delivery, it is recommended that the mother takes it easy and avoids strenuous activity, including heavy lifting and vigorous exercise, for a specified period as advised by her healthcare provider to allow the body time to heal properly.
Statements A, "I will avoid heavy lifting for a few weeks,", C, "I will watch for signs of infection at the incision site," and D, "I will take the prescribed pain medication as needed," all reflect appropriate understanding of post-cesarean recovery guidelines.