When was the black death?

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.

Select the correct answer. what are concurrent powers? a. powers granted solely to state governments b. powers granted to the national government c. powers transferred between government leaders d. powers shared between national and state governments

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by