The policy of deterrence is based on the idea that
a. when threatened, a nation should strike first so that its enemy is deprived of the option of a surprise attack.
b. economic links with another country will deter it from aggression.
c. modern warfare requires a flexible response policy.
d. the best protection against attack by an enemy is the capacity to retaliate with a devastating attack of one's own.
e. preemptive strikes on one nation will persuade other nations that hostile actions directed at the United States will be punished.
Answer: d