When United Airlines Asks One of Its Employees to Fly

Multiple Choice

When United Airlines asks one of its employees to fly from New York to Los Angeles and to pretend that he ordered a vegetarian meal (when he did not to this) in order to see the reaction of the flight attendant when he complains that he ordered this meal and was unhappy that it was not available,this is an example of:

A) a natural situation.
B) exploratory research.
C) descriptive research.
D) an experiment.
E) a mystery shopper.