The claim most strongly challenged with evidence is:
D “Families were expected to treat the children like their own.” (paragraph 7)
This claim is challenged by the evidence presented in the following sentences that describe the experiences of children after being placed with families. Specifically, it mentions that while some children found loving families, others were not treated well and were sometimes only sought for their ability to help with chores. Additionally, the separation of siblings suggests that not all families were inclined to treat the children with kindness or care. Thus, the evidence indicates that the expectation of families treating the children as their own was not universally met.