What was the life expectancy in the U.S. in 2011?

In 2011, the life expectancy in the United States was indeed approximately 78.7 years. This figure reflects various factors influencing health and longevity, including medical advancements, public health initiatives, and socioeconomic conditions at that time. Life expectancy is a critical indicator of a nation's health and wellness, representing the average number of years a person can expect to live based on current mortality rates.

The other options presented either overestimate or underestimate the life expectancy for that year. While life expectancy has been on a gradual upward trend in previous decades, figures such as 76.5 years would reflect a significantly lower expectation prevalent in earlier periods, and values like 80.1 years and 81.0 years represent averages seen in later years or more optimistic projections not applicable to 2011. Thus, the figure of 78.7 years perfectly encapsulates the statistical health data for the U.S. during that timeframe.