Answer: C. The United States has been developing and has achieved extremely sophisticated technology for saving premature and low-birth-weight babies, most of whom require extended hospital stays.
Step-by-step explanation:
The reason that can support the claim made above is that the United States has been developing and has achieved extremely sophisticated technology for saving premature and low-birth-weight babies, most of whom require extended hospital stays.
In this case, in a situation whereby the babies tahtbare given birth to aren't healthy, there's a technology that is.in place to save the life, thereby reducing the infant mortality rate.