Research studies indicate that in an emergency situation, the presence of others often
a. prevents people from even noticing the situation.
b. prevents people from assuming responsibility for assisting.
c. leads to all of these behaviors.
d. prevents people from interpreting an unusual event as an emergency.

Research studies indicate that in an emergency situation, the presence of others often:

B. Prevents people from assuming responsibility for assisting.

Explanation:

When the people see a situation where one or more people requires help from them, the people assume that the responsibility could be for anyone, not necessarily for them, also could feel ashamed because being dragged to a situation where they have not related and the people, in change of to value their bravery, could attack or talk bad them in case of actually can't help.

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