When Taking the Health History from an Obese Patient, Which

When taking the health history from an obese patient, which information obtained by the nurse is most helpful in determining whether the patient will be successful in losing weight?

A) The patient's body mass index is 39 kg/m2.
B) The patient has a history of losing weight successfully in the past.
C) The patient says, "I am ready to make some changes in my lifestyle."
D) The patient's rides a stationary bicycle.