A nurse is providing nutritional teaching for a client with a body mass index (BMI) of 30. What teaching should the nurse provide?

A body mass index (BMI) of 30 indicates obesity, defined as excess adiposity that results from chronic positive energy balance. Management focuses on caloric restriction, increased energy expenditure, and behavioral modification to reduce cardiovascular, metabolic, and endocrine complications such as insulin resistance and dyslipidemia. Rationale: A. Decreasing caloric intake combined with increased physical activity is correct. Energy deficit promotes weight loss by mobilizing stored adipose tissue. This dual approach improves metabolic rate, enhances insulin sensitivity, and reduces cardiovascular risk associated with obesity. B. Decreasing physical activity and increasing caloric intake is incorrect. Positive energy balance worsens obesity by increasing adipose deposition, insulin resistance, and cardiometabolic risk, directly opposing weight management goals. C. Maintaining current diet and exercise regimen is ineffective. Weight maintenance without modification does not address excess adiposity or reduce BMI, and it fails to improve obesity-related comorbidities such as hypertension or type 2 diabetes. D. Increasing both physical activity and caloric intake by 500 calories promotes weight gain. Caloric surplus overrides energy expenditure, leading to further adipose accumulation and worsening obesity-related physiologic stress.