Final answer:
Life expectancy is the average number of years a person is expected to live and it varies by factors like birth year, gender, and country. The options given suggest (A) 78.6 years, which is close to the provided data for the U.S. and the global average.
Step-by-step explanation:
The number of years to be lived as calculated on the basis of statistical probabilities is known as life expectancy. This measure takes into account various factors and can vary by birth year, gender, and country. For individuals born in the United States in 2015, the life expectancy was 77 years for males and 82 years for females. Diving into statistics further and considering global averages as well as increased life spans over time, we find that the average global life expectancy is around 73.4 years, with outliers beyond 100 years becoming more common.
Considering the options given in the question (A) 78.6 years (B) 80.6 years (C) 82.6 years (D) 84.6 years against the U.S. and global data, the closest choice that may represent life expectancy would be (A) 78.6 years, since it is close to the U.S. average of 77 years for males and also does not greatly exceed the global average.