Who is covered by the Walsh-Healey Public Contract Act? a. Laborers for contractors who furnish materials, supplies, articles, and equipment to any agency of the United States, provided the minimum contract amount is $2,000 b. Employees who work for vendors who provide legal services to any agency of the United States, provided the minimum contract amount is $10,000 c. Laborers for contractors who furnish materials, supplies, articles, and equipment to any agency of the United States, provided the minimum contract amount is $10,000 d. All employees of companies with federal agency contracts