Which of the following childhood disorders does the description below refer to?

"It is a chronic medical condition similar to hypertension or diabetes; it is characterized by excessive body fat. It is defined by a body mass index (BMI) above the 95th percentile for children of the same age and sex."

a) Childhood obesity
b) Childhood-onset schizophrenia (COS)
c) Body dysmorphic disorder
d) Mood disorders