Final answer:
The Americans with Disabilities Act of 1990 mandated accessible parking spaces in public areas and required reasonable accommodations for disabled persons in workplaces with 15 or more employees.
Step-by-step explanation:
The Americans with Disabilities Act (ADA) of 1990 is a significant civil rights law that was enacted to prevent discrimination against individuals with disabilities in various areas, including employment and public accommodations. The correct answer to the question is 'c. Mandated accessible parking spaces in public areas.' The ADA does not require private homes to have accessibility features, it does not set quotas for hiring people with disabilities, and it does not make it illegal for companies to lack any employees with disabilities. Instead, it requires employers with 15 or more employees to provide reasonable accommodations for disabled employees and mandates that public accommodations, like parking spaces, be accessible.