Which of the following is considered discriminatory advertising under Federal Fair Housing Law?

The choice "Catholics preferred" is considered discriminatory advertising under Federal Fair Housing Law because it explicitly favors individuals of a particular religion, in this case, Catholicism. The Fair Housing Act prohibits any advertisement that indicates a preference, limitation, or discrimination based on religion, among other protected classes. By stating a preference for Catholics, this advertisement clearly discriminates against individuals of other religions, which is a violation of the law.

In contrast, while "Families only" might imply a preference that could be interpreted as discriminatory against individuals without children, it does not explicitly mention or favor a protected class listed under federal guidelines. Similarly, "No pets allowed" addresses pet ownership rather than any protected characteristic, and "Students welcome" targets a demographic without indicating a discriminatory preference based on the protected classes outlined by the Fair Housing Act. Therefore, only the statement about preferring a specific religion crosses the line into discriminatory territory.