A historian 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?

A Find out whether the historian has written any other books about British leaders

B. Review primary sources to see if Churchill ever recorded his opinions of Nazi Germany.

C. Cite the historian's book in another study about important 20th century World leaders D.

D. Analyze secondary sources summarizing the effects of Nazi Germany on Great Britain.​

B

Explanation:

B. Review primary sources to see if Churchill ever recorded his opinions of Nazi Germany.

Explanation:

In this case, it was true that Churchill warned of the rise of the National Socialist German Worker's Party, and warned of the "...new outrage" was about to pour forth, not only from the hatred of the results and demands inflicted to the during and after World War I, but also from the sorrows inflicted to them during the Great Depression. However, his most of his colleagues failed to understand this, and instead followed the policy of appeasement, which led to the eventual downfall of France.

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