According to the Fair Housing Act of 1968, it is a prohibited act to discriminate based upon:

The Fair Housing Act of 1968 aims to eliminate discrimination in housing and ensure that all individuals have fair access to housing opportunities. One of the fundamental principles of this act is that it prohibits discrimination based on several protected characteristics to promote equality and inclusivity in housing.

Discrimination based on race, color, religion, national origin, sex, familial status, and disability are explicitly prohibited under the act. Therefore, the correct answer encompasses all of these categories, confirming that a discriminatory practice based on any of these attributes is not allowed. This comprehensive approach ensures that individuals cannot be unjustly denied housing or treated unfairly in housing-related transactions due to their personal characteristics, thus fostering a more equitable society.

Each of the other choices, like religion, race, and national origin, are protected categories on their own, but the inclusion of all these factors in the correct answer highlights the breadth of protections afforded by the Fair Housing Act.