they sent missionaries to spread the christian religion.
<span>relating to or denoting a people speaking an Indo-European language who invaded northern India in the 2nd millennium BC, displacing the Dravidian and other aboriginal</span>
Option b. India forming its own film industry, known as Bollywood.
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.
Because once an indentured servants time is up, you have to let them live their own life, but if you have a slave, you literally own them and keep them until they die if you choose to do so.