The correct answer is D. Reprisal.
Reprisal is a form of retaliation, especially in response to an injury or wrong. It is often used in international law to refer to a hostile act that is taken in response to a previous hostile act. Reprisals can be used to deter further aggression or to punish the aggressor.
Vendetta is a blood feud between two families or groups. It is often carried out over a long period of time and can result in many deaths. Repression is the act of suppressing or controlling something, especially through the use of force. It can be used to silence
dissent or to control a population. Subjugation is the act of bringing someone or something under control. It can be used to conquer a territory or to enslave a people.In the context of the question, the only option that refers to paying back injury with injury is reprisal. The other options refer to different concepts, such as vendetta, repression, and subjugation.