Saut$$ed$,$ a restaurant in California, specializes in saut$$ed food. The restaurant conducts a month$-$end bash, featuring well$-$known DJs$,$ on the last Saturday night of every month, and it is a crowd puller. The restaurant offers event$-$passes to regular customers $($customers who$$ve been billed at least $$3,000$ during the current month$)$ for free. A limited number of passes are available to other customers, at a very high price, one day prior to the event. Which of the following principles of influence is being used by the restaurant?

A$.$

Liking

B$.$

Authority

C$.$

Scarcity

D$.$

Consistency

E$.$

Transparency