Define "suicidal behavior" as per C-SSRS.

The definition of "suicidal behavior" according to the Columbia – Suicide Severity Rating Scale (C-SSRS) encompasses a range of actions that indicate the potential for attempting self-harm with the intention of ending one’s life. This includes not just actual suicide attempts, but also aborted attempts and preparatory actions that exhibit a clear intention toward a suicide attempt. These preparatory actions can involve things like gathering means, planning methods, or making final arrangements, which all demonstrate a particular level of intent and planning toward self-harm.

In contrast, other definitions offered in the choices do not align with the comprehensive criteria set forth by C-SSRS. Self-harm without the intent to die refers to behaviors that might not necessarily indicate suicidal thoughts or intentions. Thoughts of suicide without any corresponding actions, while significant in assessing risk, do not qualify as behavior in the same way that actual attempts or preparatory steps do. Expressing feelings of worthlessness is an indicator of potential underlying mental health issues but does not itself constitute a behavior related to seeking to end one’s life. Thus, the choice that describes "suicidal behavior" accurately includes all facets of actions directed towards the act of suicide.