When a Clerk of Bloomingdale's Department Store in New York

Multiple Choice

When a clerk of Bloomingdale's Department store in New York is told during a training session that she cannot receive the highest rating by someone who is hired to observe her behavior if she does not thank that shopper and say the name of the shopper (e.g."Thank you,Ms.Jones") when returning that shopper's credit card to her,this is an example of:

A) open observation.
B) a GSR study.
C) mystery shopping.
D) an EEG study.
E) a natural situation.