How Does Deterrence Prevent a Rival from Attacking the Country

How does deterrence prevent a rival from attacking the country that deters it?

A) By appeasing the rival with rewards for not attacking
B) By frightening the rival with the consequences of attacking
C) By preemptively attacking the rival and eliminating its means of attacking
D) By surrounding the rival with hostile alliances that must be attacked first
E) By undermining the rival by sponsoring dissent that weakens its ability to attack