What was the state of printing before 1450, what did Johannes Guttenberg do to change/ transform this, and what was the resulting impact from Guttenberg's improvements?

the answer is definitley b!

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.

the south did not want the federal laws to overrule the state laws.