One Finding from a Large Nationwide Study of Single-Parent and Two-Parent

One finding from a large nationwide study of single-parent and two-parent families in Sweden was:

A) children in single-parent families were better off than children in two-parent families.
B) socioeconomic status was not important when comparing the differences in outcomes for children in these two groups.
C) when socioeconomic status was taken into account, there were no differences between the outcomes for children in these two groups.
D) even when socioeconomic status was taken into account, children from single-parent families were at greater risk for developmental problems.