Principle: Any person or business knowingly aiding someone' s infringement on a copyright is also guilty of copyright infringement. Application: Grandview Department Store, which features a self-service photo-printing kiosk, is guilty of copyright infringement since a customer using the kiosk infringed on a wedding photographer' s copyright by printing photographs whose copyright is held by the photographer. Which one of the following, if assumed, most helps to justify the application of the principle? ['A person or business providing a service that can be expected to be used to infringe on a copyright should be considered to knowingly aid any copyright infringer using the service.', 'Owners of self-service facilities should monitor those facilities in order to ensure that they are not used for illegal or unethical purposes.', 'The operator of a business has the same legal obligations to customers who use self-service facilities as it has to customers who use full-service facilities.', 'The management of a business that is open to the public is obligated to report to the authorities any illegal activity that it witnesses on its property.']