American Disability Act Requires Certain Standards Are Made for Those

American Disability Act requires certain standards are made for those that are sight impaired when using an elevator. Which of the following are some of those standards?

A) The keypad has color contrasted from elevator cab, flooring finish change at entrance, lighting contrast in cab to designate floors.
B) A sign on both door jams on every floor and in raised Braille and raised letters, emergency intercom identified by Braille and raised letters.
C) Voice activation for each floor, textured surface for each floor button.
D) A Elevator service person available on request to aid those sight impaired.