This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to prepare for kidney dialysis
Make sure your vaccines are up to date.
Whether you are using peritoneal dialysis or hemodialysis, all people with end stage kidney failure should be up to date with their vaccinations to help reduce the potential for infection and illness.
End stage renal disease affects your immune system.

OPT: I. If you do not have a day-to-day need to have surgery done, you can get treated with cognitive behavioral therapy to make yourself less sick. These strategies are associated with extensive bedside visits, especially those between the ages of 35-35 years old.. II. The mortality rate is as high as 20% per year for people undergoing dialysis and the major causes are cardiovascular disease and infection. The dysfunction of the immune system is induced by uremia, or higher levels of urea in the blood system.. III. For example, side effects include low blood pressure, decreased appetite, fatigue, and medical conditions. The risk of developing kidney damage is increased if you take a dialysis prescribed by a health professional.. IV. And no one is immune to herpes sores, strains, or viral infections. It is not uncommon for only patients with house or family chemotherapy or heart disease to develop kidney failure due to a lack of immune system..
The answer is:
II.