At a local pizzeria, the hostesses deal only with customers who eat inside the restaurant. The counter personnel deal only with customers who pick up food for takeout. Management mediates conflicts between the two groups by reminding them of the pizzeria's focus on excellent customer service. This is an example of which of the following conflict management techniques?
A. Changing personnel
B. Confronting and negotiating
C. Expanding resources
D. Superordinate goals