As Time Goes on and Stresses Increase, Marital Satisfaction Goes

As time goes on and stresses increase, marital satisfaction goes down. For many couples, the reason for this drop is having children. However, which of the following statements provides evidence that it is not simply having children that causes this decline?

A) The fussier the child, the more marital satisfaction declines.
B) Child-free couples experience a decline in marital satisfaction over time.
C) Lack of homogamy is a key predictor of marital dissatisfaction.
D) Younger married couples tend to be more emotionally negative and express fewer positive emotions.