At the beginnin of the history of the world, written techniques were not created yet, therefore only oral passing from one generation to another was the only way to transmit the history. Along the time some of them were written.
D. she helped women gain equal pay and the right to vote
He gained power from overthrown his father and gaining power helped him become King by support of others
During the Cultural Revolution, bourgeois intellectual were sent to re-education camps to be taught in a communist ideology. Many of them were teachers and professors in charge of the education of the common people. But their ideology didn't match the communist one, so they were sent to these camps to be taught how was like to be a peasant or a common person who had to work hard to survive. This movement despised intellectual labor and valued hand labor.