When are people most- and least- likely to help?

Altruism is unselfish regard for the well-being of others. We are most likely to help when we (a) notice an incident, (b) interpret it as an emergency, and (c) assume responsibility for helping. Other factors, including our mood and our similarity to the victim, also affect our willingness to help. We are least likely to help if other bystanders are present (the bystander effect).

Explanation:

the right answer is: time