Final answer:
The ADA requires businesses to make reasonable accommodations for employees with disabilities, with the impact largely positive in reducing discrimination and improving access, despite some implementation challenges.
Step-by-step explanation:
The most accurate description of the impact the Americans with Disabilities Act (ADA) of 1990 has had on businesses is that most firms have found that certain accommodations are more difficult to implement than structural changes. The ADA requires employers to make reasonable accommodations for employees with disabilities, which might include making the work facility accessible or providing appropriate tools for disabled employees. Nevertheless, the ADA has been critical in advancing equal opportunities for people with disabilities, and businesses have had to adapt to these requirements.
While some firms initially feared that the costs would be prohibitive, the law offers tax credits to help offset expenses and imposes fines for non-compliance. Overall, the ADA has had a profound and positive impact, significantly improving access and reducing discrimination for individuals with disabilities in both employment and public services, despite ongoing challenges in areas like college campus accommodations and full access to certain buildings.