Which of the Following Statements Provides the Best Explanation Concerning

Which of the following statements provides the best explanation concerning 'parents who have a good marital relationship tend to have children who have better outcomes.'

A) Such parents are likely to be affluent. We have seen that poverty is related to marital strife and negative child outcomes.
B) In such families, children have good role models; they more easily learn how to get along and behave in a more pro-social manner.
C) Such parents tend to be older and more mature and their children will also be more mature.
D) Such parents are likely to spend more time together; therefore, they do not notice when their children have problems, and do not report these problems to researchers.
E) Such parents are more likely to spend large amounts of time with children.