The main purpose of a hiring a mystery guest or shopper is:
to uncover employee theft
to find ways to improve the operation
to keep employees on their toes
to catch employees when they make mistakes

To find ways to improve the operation.

Step-by-step explanation:

The main purpose of a hiring a mystery guest or shopper is: to find ways to improve the operation.

These mystery shoppers are hired by many stores or restaurants etc, to observe the services of the employees of that area.

They also measure customer service, the product quality and the work environment of their area.

Lastly, these shoppers make a report about their observations and these help to improve the operations in near future.

3=log(n)=2

answer a: product property