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An accessible route in a commercial building must have a ramp with handrails, level landings at changes of direction, and a non-slip surface. These are all important requirements to ensure safe and easy access for all individuals, including those with disabilities. Option C, minimum width of 1.2 meters, is incorrect because the required minimum width for an accessible route in a commercial building is actually 1.5 meters. This is to allow for enough space for individuals using wheelchairs or other mobility aids to maneuver comfortably and safely. Therefore, C is not a requirement for an accessible route and is the correct answer.