A Patient Who Is Morbidly Obese States,"I've Recently Made Some

A patient who is morbidly obese states,"I've recently made some changes in my life. I've decreased my fat intake,and I've stopped smoking." Which statement,if made by the nurse,is the best initial response?

A) "Although those are important, it is essential that you make other changes, too."
B) "Are you having any difficulty in maintaining the changes you have already made?"
C) "Which additional changes in your lifestyle would you like to implement at this time?"
D) "You have already accomplished changes that are important for the health of your heart."