Final answer:
Drivers must yield the right of way to disabled pedestrians using assistive devices; sidewalk ramps and Braille signs are ADA-required accommodations and accessibility forms.
Step-by-step explanation:
When a driver approaches a disabled pedestrian who is using a guide dog, white cane, or other assistive device, the correct action is to yield the right of way. This is in accordance with laws designed to ensure the safety and accessibility for people with disabilities when navigating public spaces. Therefore, the correct answer to the question is A TRUE.
Sidewalk ramps and Braille signs are indeed accommodations required by the Americans with Disabilities Act (ADA) and they also constitute forms of accessibility for people with disabilities. Thus, the correct answer to the multiple-choice question provided would be d. both b and c.