In a Group, Various Factors Influence the Probability That an Observer

In a group, various factors influence the probability that an observer will react to an emergency. But regardless of these factors, __________.

A) people will generally respond in spite of any cost to themselves
B) people will respond less when there is any cost to themselves
C) people will respond less when there is cost to themselves if the cost is potential bodily harm
D) only women are less likely to respond because of potential bodily harm