Cialdini, Reno, and Kallgren Found in Their First Study About

Cialdini, Reno, and Kallgren found in their first study about littering that when people exited a parking garage, they were least likely to litter:

A) when the confederate littered one piece of litter into a clean environment.
B) when the confederate did not litter in a clean environment.
C) when the confederate littered into a dirty environment.
D) when the confederate did not litter into a dirty environment.