Which of the following is a justified use of OC spray?

The justified use of OC spray, or oleoresin capsicum spray, is primarily focused on the protection of human life. This means that using OC spray is appropriate when there is an imminent threat to the safety of oneself or others. The primary function of this chemical agent is to incapacitate an individual temporarily, allowing the user to remove themselves or others from a dangerous situation.

In a scenario where a person feels their life is at risk due to an aggressive individual, using OC spray can help de-escalate the situation by causing temporary discomfort and disorientation. This use aligns with the principles of self-defense and protective measures, highlighting the importance of safety and preserving life.

Other options, while potentially relevant in certain contexts, do not justify the use of OC spray in the same critical manner. For example, using it merely to deter a gathering crowd or as a warning signal is not supported, as these actions do not meet the immediate necessity for self-defense or the protection of others. Similarly, employing OC spray to assist in a chase lacks a defensive justifiable context and can lead to misuse of the spray. Therefore, the most appropriate and justified use of OC spray clearly centers on the protection of human life.