Under the Americans with Disabilities Act (ADA) a hotel or restaurant can do which of the following?

a. refuse to allow a guest to register or dine who arrives looking unkempt/untidy/messy
b. refuse to serve someone on the grounds of gender, marital status, or disability
c. refuse to serve someone on the grounds of race, color, religion, or nationality
d. refuse to make modifications under the ADA because the required modifications are not readily available

D- Refuse to make modifications under the ADA because the required modifications are not readily available

Explanation:

The Americans with Disabilities Act states that the modification must be reasonable and must not "fundamentally alter the nature of the services." If the business has to alter significantly and the items are not available they will not have to make the modifications at that time. For example, an elevator should not have to be put into a building because it is requested. The store owners will have to put in ramps for the disabled if there is a second floor and they aren't able to get up any other way.