Final answer:
The client with Cushing's syndrome understands the dietary instructions if they express the intention to consume potassium-rich foods, as this helps counteract effects of excessive cortisol.
Step-by-step explanation:
The discharge instructions for a client with Cushing's syndrome are focused on dietary management to help manage the symptoms and complications associated with the condition. This involves eating foods that help to counteract the effects of excessive cortisol levels. Given the symptoms and treatments of Cushing's syndrome, the client demonstrates an understanding of the dietary instructions if they acknowledge the need to eat foods high in potassium. This is because patients with Cushing's syndrome may experience high blood glucose levels and are at risk of hypertension, making it important to regulate their diet accordingly.
Therefore, the correct statement that indicates the client understands the dietary instructions related to Cushing's syndrome would be: "I can eat foods that have a lot of potassium in them."