No one may take certain actions based on which of the following factors?

The correct answer indicates that no one may take certain actions based on age, gender, and race because these factors are protected characteristics under federal anti-discrimination laws. This means that individuals cannot be treated unfairly or unequally in various contexts, such as employment, housing, and public services, due to their age, gender, or race.

Laws such as the Civil Rights Act, the Age Discrimination in Employment Act, and various Fair Housing Acts prohibit discrimination based on these attributes. This legal framework is essential in promoting equality and ensuring that individuals have the same opportunities regardless of these personal characteristics.

By acknowledging that all of these factors are interconnected in their significance concerning discrimination, the answer captures the broader principle that no person should face bias or prejudice based on these immutable traits. This understanding is vital for those in the residential building and real estate sectors, where equal opportunity practices are crucial for compliance with the law and maintaining ethical standards.