Those Who Are Skeptical of the Rise in ADHD Diagnoses

Those who are skeptical of the rise in ADHD diagnoses have most strongly emphasized that

A) an increased use of stimulant drugs has increased the incidence of ADHD symptoms.
B) today's more frequent diagnoses of ADHD reflect our increased awareness of the disorder.
C) children by nature are not designed to sit for long hours in classroom settings.
D) ADHD is a neurobiological disorder associated with abnormal brain functioning.