Parties in Conflict Sometimes Continue to Fight Because Being Against

Parties in conflict sometimes continue to fight because being against someone else in a conflict supports the definition of their identity. They often do this even though they don't acknowledge or recognize that this is the reason for the conflict escalation. From a psychodynamic perspective, this type of conflict behavior is characterized as:

A) suppression
B) conscious reactivity
C) displacement
D) compulsiveness
E) collusion