How did the First Battle of Bull Run affect how the North viewed the Civil War?
a) The Union victory helped the North realize it would be a short war.
b) The Union victory helped the North realize it would be a long war.
c) The Union loss made the North realize it would be an easy victory.
d) The Union loss made the North realize it would not be an easy victory

thomas jefferson is the answer

this is a good question! i'll do some research and come back when i have the answer!

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.