Pahelp po please thanks

Ahistorian is writing a book about british prime minister winston churchill. she claims that churchill was one of the earliest british leaders to realize that nazi germany was a serious threat to british security what is the best way to determine whether the historian's interpretation is valid? o a. review primary sources to see if churchill ever recorded his opinions of nazi germany. o b. find out whether the historian has written any other books about british leaders. c. analyze secondary sources summarizing the effects of nazi germany on great britain. o d. cite the historian's book in another study about important 20th- century world leaders.

How conditions changed in the american south over the final decades of the 1800s for african americans. consider black politics, black voting, and the rise of segregation

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?