A Hotel Manager Is Trying to Convince Guests to Reuse

A hotel manager is trying to convince guests to reuse their bathroom towels. She places signs in all the bathrooms which read, "Discarding your towel to be cleaned after only one use wastes water, and should not be done. Many guests discard their towel after just one use, leading to a massive drain on our local water resources." What has the manager done, and what will likely happen?

A) She has activated an injunctive norm only, which should lead to less of the desired behavior.
B) She has activated an injunctive norm only, which should lead to more of the desired behavior.
C) She has activated a descriptive norm only, which should lead to less of the desired behavior.
D) She has activated both a descriptive and an injunctive norm, which will not be very effective at increasing the desired behavior.