Question

What does the use of the term fault lines reveal about how the author views world wars?

Answer 1

The answer is D: She believes that world wars are harmful to people.

 The author considers both the fault lines and the electrified fence of Communism as common enemy that, besides being harmful, they also served as focus for hatred and distrust.  But now with the end of them, she feels that   a concern seems to indicate a threat of the national identity being eliminated by the African, Mexican and Irish.

Answer 2

The answer would be D.) She believes that world wars are harmful to people.