Researchers in California Compared the Effectiveness of Instructions and Modeling

Researchers in California compared the effectiveness of instructions and modeling to encourage water conservation in campus showers. They found that

A) A sign with instructions was just as effective as the sign accompanied by a confederate modeling the behavior.
B) Compliance with instructions on the sign increased singificantly with one confederate modeling the behavior, and increased even more when two confederates did so.
C) Compliance with instructions on the sign declined when confederates were already exhibiting the behavior.
D) No one paid attention to the sign with instructions, but participants did imitate the behavior modeled by the confederates.