Conduct disorder and oppositional defiant disorder are found more frequently in children in and in lower socioeconomic classes; urban areas higher socioeconomic classes; rural areas lower socioeconomic classes; rural areas higher socioeconomic classes; urban areas

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.