The poverty rate of today compare to that of the 1970s is relatively the same. Option b is correct.
The poverty rate is the ratio of the number of people in a given age group whose income falls below the poverty line and that taken as half the median household income of the total population.
As compared with the poverty rate in the 1970s, the current rate is relatively the same, there is the minor difference between both the time periods.
Therefore, option b is correct.
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