Answer:
Firm A will pay the greatest and firm C will pay the smallest.
Step-by-step explanation:
Shirking can be defined as the act of neglecting or not doing a job properly so it is an unwanted behavior at every firm.
Even though the probability of discovering a shirker is the same at each firm, firm A pays the highest amount to their monitoring workers who keep track of the employees and their efficiency.
This wage difference can act as a performance booster for monitoring workers and can lead to the ones at firm A to be more strict causing the workers to be more productive. Therefore firm A will need to pay the greatest efficiency wage to keep their employees motivated. And firm C will pay the smallest efficiency wage.
I hope this answer helps.