Final answer:
The Fair Housing Act prohibits refusing to rent to a disabled person and requires landlords to permit reasonable accommodations or modifications at the tenant's expense. Landlords cannot discriminate based on the extent of disability or lack of current accessibility in the building.
Step-by-step explanation:
Under the Fair Housing Act, it is not permissible to refuse to rent to a disabled person for any of the reasons listed in the multiple-choice question. The Act prohibits discrimination based on disability and requires landlords to make reasonable accommodations for tenants with disabilities, which may include allowing tenants to make reasonable modifications at their own expense.
Demanding that modifications be made at the landlord's cost may result in negotiation or the use of state or local resources to assist, but refusal to rent based on disability alone is not permitted. Furthermore, even if a building is not currently accessible to wheelchairs, the Act requires landlords to allow reasonable modifications so that the person with a disability can have equal access to housing.