Deadly force can only be used:

The application of deadly force is a complex topic governed by legal standards that vary widely based on jurisdiction, but the premise is that deadly force may typically be justified under several conditions related to self-defense or the defense of others.

The assertion that all the provided options are correct speaks to the understanding that the use of deadly force is permissible under circumstances where an immediate and grave threat is present.

In the first scenario, the justification for using deadly force arises from a reasonable belief that one’s life is in danger or that there is a threat of fatal violence against them. This establishes a fundamental principle of self-defense, emphasizing the necessity of an imminent threat.

The second scenario introduces the concept of defending oneself against a criminal who poses a lethal risk, specifically highlighting situations involving a deadly weapon. This strengthens the argument for deadly force as a necessary response to prevent imminent harm.

The third scenario expands the context to the defense of property and premises. While many jurisdictions place restrictions on the use of deadly force for property protection alone, the element of physical force against an occupant elevates the situation to one where the occupant's safety is in question, thereby justifying a response with deadly force.

Overall, these scenarios collectively demonstrate the circumstances under which deadly force may be deemed just