A, "I think, therefore I am".
This is a quote from Descartes' book the Discourse on Method.
I believe it is B. Sounds like the best option.
Altering photographs was part of Joseph Stalin's propaganda efforts to increase and create in the first place a personality cult for himself. He did this with the idea of creating and establishing the idea of himself as a great and important leader who cared for his country.
The author was Abraham Lincoln.
This fact supports that idea that "<span>B. Christian historians have had a major impact on how the world divides time into periods", since BC stands for "before Christ" and AD means "the year of the Lord" in Latin. </span>