Professor: Each government should do all that it can to improve the well-being of all the children in the society it governs.
Conclusion
Governments should help finance high-quality care.
Evidence
Such day care will be available to families of all income if and only if it's subsidized, and governments should do all that they can to do to improve the well-being of all the children in its society.
Evaluate
We have a conclusion about what governments should do and we were provided a principle/rule about what governments should do.
Rule: governments should do all they can to improve the well-being of the children.
Conclusion: governments should help finance high-quality daycare.
So there's definitely a missing language link: .
We could have potentially objected,
But the bi-conditional "if and only if" rules out that. If the government doesn't subsidize, then at least some families will not have high-quality daycare available to them.
Goal
So it seems like they're just testing the missing gap between "high-quality daycare" and "improve the well-being of children".