The correct answer is B) review the primary sources to see if Churchill ever recorded his opinions on Nazi Germany.
The best way to determine whether the historian's interpretation is valid is to review the primary sources to see if Churchill ever recorded his opinions on Nazi Germany.
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.
It is very important for the historian to check primary sources to confirm her hypothesis. If Winston Churchill made a declaration on Nazi Germany previous to World War II, she will have what she needs to prove her affirmation and put it on the book. If not, she needs to get the valid materials, interviews or testimonies where she can confirm her affirmation.