In converting a historic house to a library, which one is the most cost effective way to "comply with accessibility requirements" of the CBC?

1- add an elevator

2- add wheelchair lift

3- provide refuge area

4- arrange spaces to provide equal access on the first floor.

Chen's answer is 4. I completely disagree with this since this means providing the same books, functions, etc. that are on the second floor, on the first floor. It is almost equivalent to building two libraries as well as dual staff. Let me know what you think?