A Patient in Isolation for an Incompetent Immune System Asks

A patient in isolation for an incompetent immune system asks the nurse what "disease" he has that requires placement in isolation. How should the nurse respond?

A) "Because your immune system is weak, you can develop a disease. The isolation is to protect you."
B) "I will have to find out from your doctor."
C) "It's not a bad disease. The isolation is just to make sure it doesn't spread."
D) "I am sure that once your medications start to work, you won't have to remain in isolation."