A Social Psychologist Questions Whether or Not the Participants' Willingness

A social psychologist questions whether or not the participants' willingness to help a seizure victim in Latané and Darley's (1968) experiment was influenced by the fact that it was an apparent medical emergency.This researcher could best investigate this issue by

A) surveying people as to how they respond to different types of intervention situations.
B) surveying people as to how they usually respond to medical emergencies.
C) replicating the study using different types of medical emergencies.
D) reanalyzing the data from the original study.
E) replicating the study using different types of emergencies.