"I Don't Understand," a Woman Said

"I don't understand," a woman said."I know I'm eligible for Medicare part A and it's free.Part B isn't free.When will I ever use it?" Which would be the most appropriate response by the nurse?

A) "Part A is only for hospital bills.Most care is given on an outpatient basis.Part B pays a large portion of those costs."
B) "Part A is a benefit because you paid into Social Security for more than 10 years.In comparison,part B is optional if you want that additional insurance."
C) "Part B is easy to pay for; they take the cost out of your Social Security check each month."
D) "Researchers have found that people don't waste health care resources if they have to pay a bit for them."