Darren is walking through a busy grocery store when he knocks over a display full of paper towel rolls. Many people see the paper towels fall, but no one helps him pick them up. People’s failure to...

Darren is walking through a busy grocery store when

he knocks over a display full of paper towel rolls. Many

people see the paper towels fall, but no one helps him pick

them up. People’s failure to help can most likely be attributed to ______.
a) altruism
b) reciprocal helping
c) frustration-aggression hypothesis
d) bystander apathy