Final answer:
All the options listed (national origin, handicap, color) are protected classes under the fair housing laws, ensuring equal treatment in housing and prohibiting discrimination along with other characteristics.
Step-by-step explanation:
Under the fair housing laws, all of the above options are considered protected classes. This includes national origin, handicap, and color. These laws were established to ensure that individuals receive equal treatment in the housing market, preventing discrimination based on these and other characteristics, such as race, religion, sex, and familial status. The Civil Rights Act of 1964 played a crucial role in setting the foundation for these protections by outlawing discrimination in various areas, including employment and public accommodations, and encouraging the integration of education.