Which of the following has had the most significant impact on lengthening the average lifespan in the United States?

Question

Quizplus · Accepted Answer

Major decreases in infant mortality have had the most significant impact on lengthening the average lifespan in the United States. This is because high infant mortality rates in the past lowered the overall average life expectancy. With advancements in medical care and technology, along with public health efforts, infant mortality rates have significantly decreased, leading to an increase in the average lifespan. Improved health care for the elderly, improved nutritional habits, and disease prevention among school-age children have also contributed to increased lifespan but to a lesser extent than the decrease in infant mortality.

Which of the Following Has Had the Most Significant Impact