Which one of these best summarizes the difference between the views on northerners and southerners on slavery before it became against the law for everyone?

the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity

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.