Parker Was Diagnosed with Attention-Deficit/hyperactivity Disorder (ADHD) in Grade School

Parker was diagnosed with attention-deficit/hyperactivity disorder (ADHD) in grade school.
A) Explain the most common symptoms of this disorder.Provide at least two reasons why Parker might not have many friends.
B) Parker began attending preschool at age two.Do you think this contributed to his diagnosis of ADHD? Did his early entry into school make him more or less likely to be diagnosed? Explain your answer.