Before the rig veda was written down, how were the stories in it passed from generation to generation?

What is the main idea of this excerpt? 1.1.3

1. the fifteenth amendment guaranteed for all us citizens, regardless of "previous condition of servitude." freedom citizenship voting rights religious tolerance 2. which group was still not allowed to vote following passage of this amendment? women poor men rich men former slaves 3. the fifteenth amendment was the last of the amendments. carpetbagger lincoln reconstruction scalawag

What was true about the progressive movement?