Final answer:
Sidewalk ramps and Braille signs are categorized as both accommodations required by the Americans with Disabilities Act (ADA) and forms of accessibility for people with disabilities.
Step-by-step explanation:
The question pertains to the types of accommodations required by the Americans with Disabilities Act (ADA) and how they are categorized. Sidewalk ramps and Braille signs are not disabilities themselves but are designed to facilitate accessibility for people with disabilities. They are examples of accommodations that are mandated by the ADA to promote equal access for all individuals regardless of their physical abilities.
The correct answer to the student's question is:
d. both b and c
Accommodations required by the Americans with Disabilities Act
Forms of accessibility for people with disabilities