Which of these is the biggest cause of poverty in the US?

Poverty Rate by Year

Which of these is the biggest cause of poverty in the US?

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Chronically low wages for unskilled labor
It's a failure of the US education system
Lack of a robust European style social safety net
Poor life choices and financial decisions of people living in poverty
A welfare system that incentives people to remain on welfare
other, say below
Select gender and age to cast your vote:
Which of these is the biggest cause of poverty in the US?
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