The study of bystander intervention is the study of situational variables related to helping a stranger, most notably the the decreased likelihood of helping as the number of bystanders increases.
Bystander intervention can be desribed as the intervention that is used in the prevention and de-escalation of potentially violent incidents however this can be seen as the the willingness to take action as well as the help to someone in time of need.
It help to prevent the Domestic and Sexual Violence is preventable.
Therefore, option A is correct.
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