A landlord tells a prospective tenant 'we don't have any vacancies' when in fact units are available, because the landlord does not want to rent to someone of a particular national origin. This is an example of:

Explanation

Lying to a protected class member about unit availability to avoid renting to them is a discriminatory misrepresentation (sometimes called pretextual denial) and violates the Fair Housing Act. HUD testers are used to identify this type of discrimination.