The correct answer is Impaired attention
Attention deficit / hyperactivity disorder is considered a neurodevelopmental disorder. Neurodevelopmental disorders are neurological conditions that appear early in childhood, usually before school age, and impair the development of personal, social, academic and / or professional functioning. They usually involve difficulties in acquiring, retaining or applying specific skills or information sets. Neurodevelopmental disorders may involve disturbances in attention, memory, perception, language, problem solving or social interaction. Other common neurodevelopmental disorders include autism spectrum disorders, learning disorders (eg, dyslexia) and intellectual disability.
Some experts previously considered ADHD to be a behavioral disorder probably because comorbid behavioral disorders, particularly oppositional defiant disorder and conduct disorder, are common.