Which of the Following Was Found by Bohm and His

Which of the following was found by Bohm and his colleagues?

A) Subjects generally lacked knowledge about the death penalty and its administration prior to exposure to the experimental stimulus, but were more informed following it.
B) To the degree that retribution provided the basis for support of the death penalty, knowledge had little effect on opinions.
C) Exposure to death penalty information may result in the polarization of opinions.
D) When opinions about the death penalty do change, it is most likely because of administrative reasons such as racial discrimination or executing innocent people.
E) all of the above