____________________ is the minimum clear floor space required in front of a handicapped accessible lavatory?

The minimum clear floor space required in front of a handicapped accessible lavatory is 30 inches by 48 inches. This requirement ensures that individuals using mobility devices, such as wheelchairs, have sufficient space to maneuver comfortably and safely. The dimensions of 30 by 48 inches provide ample room not only for access but also for ease of use, allowing for proper positioning in front of the sink. This standard is in place to promote accessibility and compliance with the Americans with Disabilities Act (ADA), which aims to ensure that individuals with disabilities can access facilities without barriers.

Other choices listed do not meet the ADA standards for clear floor space in front of a lavatory, which contributes to their inappropriateness for this context.