Which of the Following Is the Best Example of the Impact

Which of the following is the best example of the impact of a "security community"?

A) Allies disagree with one another about their security interests and costs.
B) Rival states cooperate with one another because they come to share a sense of moral purpose and a level of mutual trust.
C) Espionage accumulates information about new war-making technology.
D) A hegemonic power is able to coerce other states into supporting its policies.