In the Latané and Rodin (1969) Experiment in Which Participants

In the Latané and Rodin (1969) experiment in which participants apparently heard a woman in an adjacent room fall from a chair, most participants who did not intervene later indicated that:

A) they badly wanted to help but were afraid they might look foolish
B) they felt that it was not their business to do anything
C) they thought that someone else would react appropriately
D) they were unsure about what had happened, or believed that nothing serious had occurred
E) both a and b