Accessible toilets MUST be mounted at ______ AFF to the top of the toilet seat.

The correct answer indicates that accessible toilets must be mounted at a height of 17"-19" Above Finished Floor (AFF) to the top of the toilet seat. This range is established to comply with the accessibility guidelines set forth by regulations such as the Americans with Disabilities Act (ADA).

The specified height ensures that individuals with disabilities can use the facilities comfortably and safely. A height within this range accommodates users who may be transferring from wheelchairs or require support while using the toilet, thereby enhancing usability and accessibility for all.

The chosen range is based on ergonomic considerations, allowing a balance between accessibility and comfort. Compliance with these standards ensures that public restrooms are equipped adequately to meet the needs of a diverse population, promoting inclusivity and dignity.

Other height ranges either fall below or exceed the mandated specifications leading to potential barriers for users with disabilities. Thus, the 17"-19" AFF height serves as a specific guideline to foster an accessible environment in public restrooms.