Which of the Following Is Probably an Example of a Pivotal

Which of the following is probably an example of a pivotal norm in the family restaurant in the scenario in chapter 6?

A) If your customer is a regular, spend more time at his or her table.
B) If your customer is a regular, you should know his or her name.
C) If you are going to miss a shift, you call in at least two hours ahead of time.
D) If you see someone is really busy, you should help out.