The Nurse Is Teaching a Client Deep-Breathing Exercises

The nurse is teaching a client deep-breathing exercises.The client asks,"Why do I need to make that funny shape with my lips when I breathe out?" Which is the most appropriate nursing reply?

A) "You can actually exhale anyway you like;the lip shape is not important."
B) "Pursed-lip breathing helps you control the exhalation and helps to keep your airways open."
C) "Don't worry about the lip shape;concentrate instead on the pace of your breathing."
D) "The shape of the lip decreases the cough and choking reflex."