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Background information: life expectancy is the number of years the average citizen is expected to live. these predictions were created by the us census. life expectancies in the united states have gradually over time. by 2020, the average american is expected to live for about years.

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gauravsingh23VT

By 2020, the average American will be 79 years old, it is 70 for men and 75 for women in the America. The US Census generated these predictions. Life expectancy in the United States has gradually increased over time.

What is life expectancy?

Life expectancy is the number of years a person is expected to live on average. It is calculated based on the statistical average.

Life expectancy can be different in different areas and it depends on the era. As people in the early eras liked to live longer than now.

Thus, it is life expectancy

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Answer:

B, C is the answer

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