The answer is C. Kidnap.
The other four words (A. Assassinate, B. Kill, D. Stab, and E. Murder) all refer to the act of intentionally taking a human life. Kidnapping, on the other hand, is the act of taking someone away against their will, without their consent. It is a crime that can be committed for a variety of reasons, such as ransom, sexual assault, or forced labor.
Assassination is the act of killing a person, especially a public figure, for political or religious reasons. Murder is the unlawful killing of another human being with malice aforethought. Stab is a verb meaning to pierce or wound with a sharp object, such as a knife.