Many african americans migrated to northern cities to escape discrimination in the south.

This is true. This event occurred during the division of the north and south in our nation over the hot topic of slavery. If a slave was lucky enough to escape their owner, they would usually move somewhere in the north U.S. where where most of the antislavery supporters lived. The most common way for a slave to escape was by traveling through the Underground Railroad which was also built by antislavery supporters. Hope this helps and have a great day! :)

This is true because of slavery laws being almost non-existent in the northern states.

Maybe because he failed the classes or is very accelerated.