Duncan and Colleagues Have Found That the Chances a Low-Income

Duncan and colleagues have found that the chances a low-income child will graduate from high school are dramatically increased if

A) there is a $10,000 increase in income during the first five years of life.
B) there is a $10,000 increase in income during middle school.
C) there is a $10,000 increase in income during high school.
D) a family moves to a nicer house at some point during childhood.