The correct answer is C) Appeasement.
Unfortunately, you forgot to include the information of source 1. We do not know what it is, just you know it.
However, trying to help you, we can comment based on our knowledge of this topic.
The key term is Winston Churchill blaming as a cause for World War II is "Appeasement."
The policy of appeasement was the act of giving in to Hitler's demands in exchange for peace.
The policy of appeasement was supported by British Prime Minister Neville Chamberlain as a way to avoid another big war such as World War It consisted of giving Adolph Hitler some European territories such as Czechoslovakia, under the Agreement of Munich of September 30, 1938.
Winston Churchill considered this a wrong decision that put Great Britain in a weak position against Adolph Hitler. And he was right.
