In Dutton and Aron's Famous Experiment, Male Subjects Were Interviewed

In Dutton and Aron's famous experiment, male subjects were interviewed by a female confederate of the experimenter on either a stable platform bridge or on a flimsy suspension bridge that extended over a river gorge (the independent variable) What was the dependent variable in this study?

A) how long it took subjects to cross the bridge
B) subjects' body temperature and heart rate
C) subjects' willingness to obey instructions given by the female interviewer, who told them not to cross the bridge, but to go back the way they had come
D) whether subjects sought contact with the female interviewer after the study had ended
E) both a and b