Why would a historian which to consult multiple sources of information on a topic

the answer is a. harriet tubman was a nurse on the battlefield.

there was a king, priests, and peasants.

eleanor roosevelt

his husband tremodulny   by adding propserity and being serious about thingds aswell such as with the new deal one of the best first ladies out there was eleanor

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.