Which act mandated the federal purchase of products from workshops for the blind?

The Wagner-O'Day Act is the correct response because it specifically authorized the federal government to purchase products made by workshops for the blind. This act aimed to promote the employment of individuals who are blind, ensuring they have the opportunity to contribute to the workforce while emphasizing the importance of sustaining their independence and dignity. By facilitating the purchase of these products, the act not only supported workshops but also raised public awareness of the capabilities of individuals with visual impairments.

The other acts mentioned have different focuses. For example, the Randolph-Sheppard Act allows blind individuals to operate vending facilities on federal property, thereby promoting economic opportunities but does not directly focus on the purchase of products. The Barden-LaFollette Act amended previous legislation to provide certain rights concerning vocational rehabilitation but isn't directly tied to the purchase mandate. Lastly, the Sheppard Act primarily referred to measures in support of education and professional training for individuals with disabilities, rather than specific procurement policies.