Which of the following accurately describes the effects of the Thirteenth, Fourteenth, and Fifteenth amendments on the lives of southerners? Black southerners had more political and economic freedom.

Black southerners were forbidden to serve as elected officials.

These amendments had little effect on the lives of southerners.

less available tax revenue

this basically means that when they get money from taxes wirth having a lower gdp they get less then what others have with a higher gdp

i believe it would influence their own way of understanding things. it shall be a foundation where they can draw or start an argument.   historians are also  scientists that  have their tools of analysis and expertise to unlock a variety of difficulties such as relationships of man, origin, politics, economy, and culture. based on facts and understanding on these areas, they may shade light to extract ideas and develop options to validate a hypothesis or debunk it.

you really can't answer this on your own?