What is the denotative meaning of fault lines in this excerpt?
Read the excerpt from "A Quilt of a Country."
Once these disparate parts were held together by a
common enemy, by the fault lines of world wars and the
electrified fence of communism. With the end of the
cold war there was the creeping concern that without a
focus for hatred and distrust, a sense of national
identity would evaporate, that the left side of the
hyphen-African-American, Mexican-American, Irish-
American-would overwhelm the right.
lines that are drawn when placing blame
O areas of defense in times of war
Olong cracks in the surface of the earth
O breaks in modern American Society

Areas of defense in times of war

Explanation:

The except speaks of the potential of national unity in the United States being shattered as a result of a lack of a common enemy that the World Wars and Communism gave them.

The Fault lines in the excerpt refer to demarcations between opposing sides in the World Wars and in the Cold War that people then gathered behind to fight against their enemy. This made these lines become Areas of defense in essence that everyone came behind in solidarity to defeat their World War and Cold War enemies.  

d. therefore pilots wisely train these cubs by various strategic tricks to look danger in the face a little more calmly.

c or d they are the same

idk

explanation: