You Are Designing a Corridor for a Commercial Building

You are designing a corridor for a commercial building. The corridor has a requirement for protrusions that enter into the walkway to consider for those that are sight impaired. What dimensions will meet those requirements for all objects.

A) Objects mounted on a wall must be mounted all on one wall so a sight impaired person can stay to only one side.
B) Objects mounted between 27 inches and 80 inches cannot project more than 4 inches into the circulation path.
C) Objects mounted must be mounted below 36 inches so a person does not hit an item with their head.
D) Objects must be mounted on the floor so a sight impaired person can detect them with their cane.