Rodney parks his car at Car Stack Parking Lot, Inc. On the back of the parking stub provided to Rodney, there is a statement typed in large letters: "NOT RESPONSIBLE FOR DAMAGE TO CARS." When Rodney returns, his car has been dented by the Car Stack attendant who was attempting to park more cars on the lot. According to law, the statement on the stub:

a- not enforceable against Rodney because it's contrary to public policy

b- enforceable against Rodney only if he had the opportunity to park elsewhere

c- enforceable against Rodney regardless of circumstances

d- not enforceable against Rodney because he instructed the attendant to be careful around his car