Suppose you want to get people to use less electricity where you work by getting them to turn off lights when they leave. which of the following is most likely to succeed, based on research in social psychology?
a. ask people to sign the public pledge and write about times they did turn off the lights when they left.
b. ask people to do both--sign the public pledge and write about times they didn't turn off the lights.
c. get people to sign a public pledge that they will turn off lights when they leave.
d. ask people to write about times when they forgot to turn off lights when they left.