Which of the following practices is not a federal guideline for advertising real estate?

The practice of designating income preferences in advertisements is not a federal guideline for advertising real estate. Federal laws aim to ensure that advertising in real estate is fair and nondiscriminatory. The Fair Housing Act prohibits discrimination against protected classes, including race, color, national origin, religion, sex, familial status, and disability. Therefore, any form of advertising that explicitly states a preference based on income can be seen as discriminatory, as it may indirectly favor certain demographic groups while excluding others, which goes against the principles of equal housing opportunity.

On the other hand, limiting advertising based on race, excluding options based on handicap, and restricting preferences based on family status are all practices that would be contrary to the Fair Housing Act. These practices would result in unlawful discrimination against individuals belonging to protected classes, highlighting the importance of inclusivity in real estate advertising. The emphasis on fair advertising aligns with the broader goals of promoting equal access to housing for all individuals, regardless of their background or circumstances.