3. A columnist in a national paper recently wrote about the increase in childhood poverty in the U.S. The columnist attributed the increase in childhood poverty to the collapse of marriage and the increase of single-parent households. The columnist noted that families headed by single mothers are five times as likely to live in poverty as married-couple families; children in single-mother homes are less likely to graduate from high school or earn a college degree and they are more likely to become single parents themselves. a. Provide at least two arguments to refute the columnist's claims that increases in single-parent households are causing an increase in childhood poverty. What other factors could be influencing an increase in childhood poverty? What factors could be influencing both an increase in single-parent households and childhood poverty? (4 points) b. Is the columnist confusing causation and correlation? ( 2 points) c. Propose how you would study factors that influence childhood poverty--what type of study would you conduct? What type of data would you collect (cross-sectional, time series; identify specific variables or factors)? Explain your answers. (4 points)