Which type of aggression is used by a person who is constantly angry at the world and is looking for an excuse to go off?

The correct answer is C. Irritable.

Irritable aggression is characterized by an individual’s tendency to respond with anger and hostility, often over minor provocations or frustrations. A person who is constantly angry at the world and seeks an excuse to lash out is displaying this type of aggression, which is often impulsive and emotional rather than calculated or planned.