A client comes to the physician's office for a follow-up visit 4 weeks after suffering a myocardial infarction (MI). The nurse takes this opportunity to evaluate the client's knowledge of the ordered cardiac rehabilitation program. Which evaluation statement suggests that the client needs more instruction?A. Client performs relaxation exercises three times per day to reduce stress. B. Client walks 4 miles in 1 hour every day. C. Client's 24-hour dietary recall reveals low intake of fat and cholesterol. D. Client verbalizes an understanding of the need to seek emergency help if his heart rate increases markedly while at rest.