Shannon works as a server at The Rafters, a new bar in town. Under a city ordinance, bartenders and servers are required to be licensed. The licensing ordinance requires filling out an application and submitting a $50 application fee. The application does not require any special education or experience, just the $50 fee. Robert enters Shannon's bar, orders a round of drinks for the house, then notices that Shannon's license is not on display behind the bar. Robert, a business law student who sometimes comes to class, refuses to pay for the round of drinks because Shannon is not licensed. The Rafters sues. What result?

a. Since this is an illegal contract, the courts will not enforce it.
b. Since Shannon violated a regulatory statute, the contract is unenforceable.
c. Since this is a revenue-raising statute, The Little Nipper wins.
d. Since this is a revenue-raising statute, the licensing law is unconstitutional. Craig wins.