Your Little Brother,who Is 8 Years Old,has Gained a Lot

Your little brother,who is 8 years old,has gained a lot of weight over the past couple of years and your parents are concerned.At his annual physical exam,the doctor indicated that he had a BMI of 23.This means that your brother ____.

A) is obese
B) is overweight
C) is of normal weight
D) is actually underweight for his age