The provided scenario gives an example of variability in the service provided by the rental company.
Option C is the correct answer.
The corporate rate is the fees levied by the hotel or rental company for a stay from their guests.
The variability in service by the rental company can be analyzed from the charging of two standard rates for the initial two trips done by the Park in respect of renting a car. But for the third trip, Park has to give a much higher amount for the same company for the renting service.
Therefore, the levying of higher charges for the third trip creates variability in the rental services provided by the company.
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