29.
...a political opportunity Reconstruction opened up to former slaves

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.

this is a matching game essentially!

event - pope leo x refuses to annul henry viii's marriage to his first wife.

cause - england establishes its own church separate from the roman catholic church.

event - martin luther writes his ninety-five theses, criticizing some of the church's practices.

cause - a new religion formed in germany taught that salvation can be met through faith alone.

event - holy roman emperor charles v declares war on protestants in germany.

cause - the rulers of germany's territories were free to decide the religion of their state.

event - elizabeth i, a protestant who was tolerant of catholics, became the queen of england.

cause - the anglican church was reestablished in england.

estoy bastante seguro de que la respuesta es una