In a Study by Johnson and Downing (1979), Participants' Anonymity

In a study by Johnson and Downing (1979) , participants' anonymity was manipulated and then the participants were asked to give shocks of varying levels to another person when they failed a task. The results of this study showed that:

A) Participants dressed as nurses gave lower levels of shock when they were identifiable.
B) Participants dressed as nurses gave lower levels of shock when they were unidentifiable.
C) Participants who wore robes and hoods and were unidentifiable gave lower levels of shock than participants in any other condition.
D) Participants who wore robes and hoods and were identifiable gave higher levels of shock than participants in any other condition.