The graph shows changes in life expectancy in the United States over a fifty-year period.

A line graph titled Life Expectancy in the United States shows years on the x axis and age on the y axis. The line starts at 70 in 1960, to 71 in 1970, 74 in 1980, 75 in 1990, 76 in 2000, to 78 in 2010.

What challenge arose as a result of the trend shown above?
A. educating millions of school-age children
B. providing medical care for an aging population
C. keeping people from leaving the country to retire overseas
D. offering easy-to-follow voting registration procedures

The challenge that arose as a result of the trend showing in the graph pertaining to life expectancy is the act of proving medical care for an aging population.

Option B is correct.

What is a life expectancy?

A life expectancy is defined as the table describing the number of persons who died in respect of the total population. It reflects the death rates in every year.

According to the graph, the life in years shown on x-axis and y axis represents the number of years in decades. This shows that the life expectancy increases by 1% after until 1970 then 3% until 1980, 1% until 1990, 1% until 2000 and then 2% until 2010. This resulted in medical care for an aging population.

Therefore, the correct option is option B.

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