According to the Meta-Analysis by Fischer Et Al

According to the meta-analysis by Fischer et al. (2011) of bystander intervention research, what happens when the situation is clearly dangerous to the potential bystander?

A) intervention decreases as the number of bystanders increases
B) intervention increases as the number of bystanders increases
C) arousal is increased if there is actual risk to the bystander
D) arousal is decreased if there is actual risk to the bystander
E) both b and c