The husband of an older adult woman, diagnosed with pernicious anemia, calls the clinic to report that his wife still has memory loss and some confusion since she received the first dose of nasal cyanocobalamin two days ago. He tells the nurse that he is worried that she may be getting Alzheimer's disease. Which action should the nurse take?

A. Ask if the client is experiencing any change in bowel habits: Changes in bowel habits are not directly related to the confusion or memory loss seen in pernicious anemia. The concern here is primarily with vitamin B12 deficiency. B. Determine if the client is taking iron and folic acid supplements: While iron and folic acid are important, they don't directly address the memory loss and confusion related to B12 deficiency. The immediate focus should be on the effects of the B12 treatment. C. Encourage the husband to bring the client to the clinic for a complete blood count: A CBC can help monitor anemia, but it doesn't address the memory issues. The nurse should first explain the symptoms related to B12 deficiency. D. Explain that memory loss and confusion are common with vitamin B12 deficiency: Memory loss and confusion are known symptoms of vitamin B12 deficiency. These symptoms may take time to improve with treatment, and educating the husband helps alleviate concerns.