A 64-year-old man was diagnosed 19 months ago with bilateral osteoarthritis (OA) in his knees, and ...

A 64-year-old man was diagnosed 19 months ago with bilateral osteoarthritis (OA) in his knees, and has come to his family physician for a checkup.
 
  The client and his physician are discussing the effects of his health problem and the measures that the man has taken to accommodate and treat his OA in his daily routines. Which of the following statements by the client would necessitate further teaching?
  A)
  I'm really trying to lose weight, and I've been able to lose 15 lb this year so far.
  B)
  I've been doing muscle-strengthening exercises twice a week at the community center near my house.
  C)
  Even though I don't like it, I've been using my walker to take some of the weight off my knees.
  D)
  I've been avoiding painkillers because I know they can mask damage that I might be inflicting on my knees.