A rental service must avoid advertising in a misleading manner regarding which of the following?

The rental service has a responsibility to ensure that all advertising is accurate and not misleading, particularly concerning fees charged and the services provided. This is crucial because potential renters base their decisions on this information, and any discrepancy can lead to misunderstandings and dissatisfaction. Misleading representations about costs or the nature of services can lead to legal repercussions and damage to the service's reputation.

While the other options also pertain to important aspects of advertising—such as conditions of the property, neighborhood information, and types of units available—the most critical focus lies in clarity about fees and services. This information impacts the financial decision-making process of prospective tenants, directly affecting their rental experience. Consumers must have a true understanding of their financial obligations to make informed choices in the rental market.