558 - Logical Reasoning

As any economist knows, healthy people pose less of an economic burden to society than unhealthy people. Not surprisingly, then, every dollar our state government spends on prenatal care for undocumented immigrants will save taxpayers of this state three dollars.
Which of the following, if true, would best explain why the statistics cited above are not surprising?

1. The state's taxpayers pay for prenatal care of all immigrants.
2. Babies born in this state to undocumented immigrant parents are entitled to infant care benefits from the state.
3. State benefits for prenatal care serve to promote undocumented immigration.
4. Babies whose mothers did not receive prenatal care are just as healthy as other babies.
5. Pregnant women who do not receive prenatal care are more likely to experience health problems than other pregnant women.