Final answer:
A door must be wide enough to allow a person in a wheelchair to pass through, as per the ADA guidelines.
Step-by-step explanation:
A door must be wide enough to allow a person in a wheelchair to pass through. This is to ensure that people with disabilities have equal access to buildings and facilities.
According to the ADA, the minimum clear opening width for a doorway is 32 inches when the door is open at a 90-degree angle. This provides enough space for a standard wheelchair to pass through comfortably.