Karen is 17 years old and has a BMI that indicates appropriate weight. She loves to eat all kinds of food. Which strategy will best help Karen maintain her health? A. eat nutrient-dense food and engage in regular physical activity B. start controlling her diet and walk two miles each day C. avoid food with unsaturated fat and take up a sport like tennis

The correct answer is A. Eat nutrient-dense food and engage in regular physical activity

Explanation:

An appropriate BMI (Body Max Index) indicates there is an appropriate balance between diet and physical that helps Karen maintain a healthy weight. Due to this, it is not necessary for Karen to drastically change her habits but just to follow general healthy recommendations; this includes eating nutrient-dense food such as fruits, vegetables, lean meats or nuts as these contain multiple nutrients that are essential for health.  Also, she must do exercise regularly as this will help Karen to have healthy health and will prevent diseases such as diabetes or high blood pressure. Thus, the best strategy for Karen is "Eat nutrient-dense food and engage in regular physical activity."