b. False
A BMI of 28.5 does not necessarily categorize someone as obese. BMI (Body Mass Index) is a measure of body fat based on height and weight, but it does not take into account factors like muscle mass, bone density, and distribution of fat. While a BMI of 28.5 may indicate that Carolyn is overweight, it doesn't automatically mean she is obese. Obesity is typically defined as having a BMI of 30 or higher. However, it's important to remember that BMI is a simplified metric, and individual health should be assessed comprehensively by a healthcare professional.