Final answer:
Child labor laws had little impact because a. they were often ignored and not well enforced, and effective federal legislation was not passed until much later.
Step-by-step explanation:
Though child labor laws existed, they had little impact because A. They were often ignored and poorly enforced. Efforts to pass meaningful legislation at the federal level faced significant challenges and failures until the Great Depression, which subsequently led to the recognition of the need to protect adult jobs.
Despite some state-level regulations to limit child labor and improve workplace safety, these measures were not consistently enforced, and children continued to work in difficult conditions to support their families.
The pressure from anti-child labor organizations eventually led to a decline in child labor, particularly as compulsory education laws began to take effect.