Final answer:
Security guards on private property enforce the rules based on the authority given to them by the property owner, acting as the owner's agents.
Step-by-step explanation:
As a security guard working on private property, you are enforcing rules on the site under the authority of D. As an agent of the owner of the company. Although police are responsible for enforcing laws and maintaining public order, their jurisdiction spans across federal, state, or community levels depending on their role and cannot be universally applied to the enforcement of rules on private property. Instead, security guards act on behalf of the property owner's interests to ensure the safety and security of the premises, personnel, and visitors by enforcing the company's policies and rules, as well as, where applicable, laws like the Trespass to Property Act.