According to the diagnostic criteria, how many symptoms should be present and how long should symptoms persist for diagnosis of ADHD?
A. At least 3 symptoms for 3 months
B. At least 6 symptoms for 6 months
C. At least 4 symptoms for 4 months
D. At least 5 symptoms for 5 months
E. At least 3 symptoms for 9 months
A. At least 3 symptoms for 3 months
B. At least 6 symptoms for 6 months
C. At least 4 symptoms for 4 months
D. At least 5 symptoms for 5 months
E. At least 3 symptoms for 9 months